Montblanc Heritage Chronométrie Collection. The SIHH 2015-novelties.

  • uwatches
  • June 12, 2017
  • Comments Off on Montblanc Heritage Chronométrie Collection. The SIHH 2015-novelties.

With its new Heritage Chronométrie Collection Montblanc is ready to go for new horizons. Discover the entire collection as presented here in Geneva at the SIHH 2015 by clicking on “read more”…

Montblanc says … The Heritage Chronométrie Collection unites fundamental virtues of fine watchmaking, the best Swiss craftsmanship, and Montblanc’s own tradition. These are reflected in refined, elegantly puristic cases and innovative mechanisms.”

Montblanc did choose the famous Portuguese explorer Vasco da Gama to give its new collection a name.

I asked why?

Montblanc told me:  … Vasco da Gama’s pioneering spirit and skilful navigation inspired Montblanc to create a new watch collection which connects the Portuguese explorer’s obsession with precision and the roots of fine watchmaking. Precision, which has always been the paramount goal of watchmaking, has become synonymous with the French word “chronométrie”, i.e. highly accurate time measurement. This heritage of fine watchmaking provided the name for the new Montblanc Heritage Chronométrie Collection. A special edition of the timepieces in this series bears Vasco da Gama’s name and pays homage to this outstanding discoverer. The distinctive cruciform constellation in the sky above the Southern Hemisphere also plays an essential role …

But it is not only Vasco da Gama who inspired Montblanc to create this new collection; it is also the heritage of Minerva. I am sure you all know that Montblanc bought the manufacturer a couple of years ago and integrated it under its roof.

So I asked Montblanc: What was Minerva´s input to the new Heritage Chronométrie Collection?

This is what I was told:

…. In the course of its 157-year history, Minerva in Villeret distinguished itself as a specialist in one of the Swiss watchmaking industry’s most important traditions: namely, chronometric functions, especially chronographs and stopwatches. Important developments that originated in Villeret include Calibre 13/20, which debuted in the early 1920s as one of the first chronograph calibres developed especially for use in wristwatches, and the hundredth-of-a-second stopwatch, which was unveiled in 1936. This dedication to precise time measurement and the necessarily associated mastery of various frequencies enabled Minerva to set itself apart at an early date as a leading expert in the fabrication of its own balances and hairsprings. The Montblanc Manufacture in Villeret upholds and continues this tradition today. This same heritage also inspired Montblanc to develop the movements for the Heritage Chronométrie Collection. But Minerva’s history also provides another great role model: the “Pythagore”, which Minerva debuted in the 1950s. This model encased either 10½-ligne hand-wound Calibre 48, which was developed in 1948 and displayed the seconds on a subdial, or 10½-ligne hand-wound Calibre 49 with a sweep second-hand. Its design codes, which epitomized classical Swiss fine watchmaking, serves today as the inspiration and basis for the design of the Heritage Chronométrie Collection. Leaving nothing to chance, the cases too have been refined in every detail: they have satin-finished and polished surfaces, a low overall height and slim appeal, a stepped bezel with a flat surface, and rounded horns with characteristic facets. The crown bears a relief engraving of Montblanc’s distinctive emblem. A sunburst or “grainé” pattern embellishes the dials, which celebrates their chronometric heritage with a precisely legible minute scale double facetted applied indexes and timelessly styled Arabic numerals. Facetted word-shaped hands complete the harmonious picture and assure clear readability of the various functions in the spirit of Swiss “chronométrie” …

 

Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph

Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph

 

Listen to my conversation with Alexander Schmiedt, Montblanc´s watch director, taped yesterday Sunday here in Geneva. Alexander will explain you everything about this new gorgeous Montblanc-collection…

 

 

Alexander Schmiedt, Montblanc´s watch director

Alexander Schmiedt, Montblanc´s watch director

 

This was the Montblanc-timepiece he was wearing today…

Montblanc Heritage Spirit Orbis Terrarum

Montblanc Heritage Spirit Orbis Terrarum

 

 

Let us now discover the new Heritage Chronométrie Collection on the next pages you will find the following SIHH-novelties

Page 1: Montblanc Heritage Chronométrie Dual Time

Page 2: Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph

 

Thereafter the Montblanc Heritage Chronométrie Vasco da Gama Limited Editions

 

Page 3: Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph Vasco da Gama Limited Edition 60

Page 4: Montblanc Heritage Chronométrie Quantième Annuel Vasco da Gama

Page 5: Montblanc Heritage Chronométrie Quantième Complet Vasco da Gama

Page 6: Montblanc Laboratory Test 500

 

 

Montblanc Heritage Chronométrie Dual Time

 

Montblanc Heritage Chronométrie Dual Time

Montblanc Heritage Chronométrie Dual Time

Montblanc Heritage Chronométrie Dual Time

Montblanc Heritage Chronométrie Dual Time

 

Montblanc Heritage Chronométrie Dual Time

Ident. 112540

 

Movement Calibre MB 29.19 (Sellita + in-house Manufacture complication)

Type of movement Mechanical movement with automatic winding, second time zone and day/night display

Number of rubies 34

Power reserve Approx. 42 hours

Balance Flat hoop

Frequency 28,800 A/h (4 Hz)

Hairspring Flat

Displays Local time: central hours and minutes, small seconds at 6 o’clock, second time zone in the centre and at 12 o’clock with 24-hour display and a day/night indication Date window at 3 o’clock

Special features In-house-developed complication with rapid adjustment of the local time in hourly steps, date linked to local time with date change either forward or backward, home time, minutes and seconds continue to run during local-time adjustment

 

Habillage

Case Polished stainless steel case, polished and satin-finished bezel

Crystal Scratch-resistant, domed and antireflective sapphire crystal

Back Stainless steel with inset pane of sapphire crystal

Dimensions Diameter = 41 mm; height = 9.97 mm

Watertightness 3 bar

Crown Stainless steel with Montblanc emblem in raised relief

Dial Silvery white dial with sunburst pattern, facetted indexes, Arabic numeral “12” as rhodium-plated appliqués, rhodium-plated sword-shaped hour-hand and minute-hand, blued steel hour-hand for the second time zone, the 24 hour and the day-night indicators, rhodium-plated small seconds, date shown in a window

Wristband Black alligator-skin strap crafted at the Montblanc Pelletteria in Florence with stainless steel triple folding clasp

Certified by the Montblanc Laboratory Test 500

Price 3’990 euros

 

 

 

 

Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph

 

Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph

Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph

Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph

Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph

Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph

Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph

 

Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph

Ident. 112542

 

Movement Montblanc in-house Manufacture Calibre MB R230

Type of movement Mechanical movement with double barrel, automatic winding mechanism, one-minute patented ExoTourbillon with stop-second mechanism

Chronograph Monopusher with column-wheel and vertical coupling

Dimensions Diameter = 33.7 mm; height = 8.65 mm

No. of components 296

No. of rubies 44

Power reserve Approx. 50 hours

Balance Screw balance, diameter = 9.7 mm; moment of inertia = 12 mgcm2

Frequency 21,600 A/h (3 Hz)

Hairspring Flat

Plate Rhodium plating and circular graining

Bridges Rhodium plating and côtes de Genève

Gear-train Special tooth profile improves the efficiency of the power transmission

Displays (watch) Off-centre hours and minutes,Date by hand on same axis as hour- and minute-hand, and off-centre subdial, Patented ExoTourbillon at 6 o’clock (one revolution per minute to indicate the seconds) with a stainless steel tourbillon bridge

Displays (chrono) 60 elapsed seconds and 30 elapsed minutes Counters with double indication hands and corresponding sectorial scales

Special feature Travel function with rapid reset of hour-hand and date display either forward or backward, Tourbillon can be stopped by directly halting the balance wheel

 

Habillage

Case 18 K red gold (5N), polished case with satin-finished interhorns, concave bezel for scratch protection

Crystal Scratch-resistant, domed, sapphire crystal with antireflective treatment on both surfaces

 

Back Screwed 18 K red gold back with inset pane of sapphire crystal

Dimensions Diameter = 44 mm; height = 14.79 mm

Watertightness 3 bar

Crown 18 K red gold (5N) with Montblanc emblem in raised relief

Push-piece Monopusher at “8 o’clock”

Dial Ivory grainé on the upper part and vertical satin-finished silver on the lower part, facetted indexes, Arabic numerals “3, 9, 12” as red gold-plated appliqués, red gold-plated sword-shaped hour-hand and minute-hand, date-hand with a little red crescent at its tip, chronograph with two white-lacquered counters (one counter for 60 elapsed seconds at “8 o’clock” and a second counter for 30 elapsed minutes at “4 o’clock”), double indication hands and corresponding sectorial scales

Wristband Black alligator-skin strap crafted at the Montblanc Pelletteria in Florence with 18K red gold pin buckle (5N)

Certified by the Montblanc Laboratory Test 500

Price 38’000 euros

 

In 2010 Montblanc debuted the patented ExoTourbillon mechanism, which was completely developed and built in the Manufacture in Villeret, as part of the Collection Villeret.

In 2015 Montblanc returns to this complication to integrate it into Montblanc’s own monopusher automatic chronograph calibre in the Heritage Chronométrie Collection.

As a consequence of the architecture of a classically constructed movement, the balance’s centre of gravity temporarily strays from the axis of rotation due to the influence of Earth’s gravitational force, which is particularly troublesome when the timepiece is in a vertical position. A tourbillon mechanism compensates for this centre-of-gravity error by enclosing the escapement inside a carriage or cage that continually rotates around its own axis. Gravity’s accelerating effect during the first 180 degrees of the carriage’s rotation is offset by a corresponding deceleration during the second 180 degrees, so the watch’s average rate remains constant. Montblanc installed a large, massy, screw balance in the Heritage Chronométrie ExoTourbillon Minute Chronograph. In a traditional tourbillon construction, this large balance would require a correspondingly large and heavy rotating cage. But the innovative mechanism of the ExoTourbillon solves this problem by isolating the screw balance from the rotating cage.

The cage is smaller than the balance, which oscillates outside the rotating carriage and on a higher plane. The screw balance is borne between two jewels, while the tourbillon is neither cantilevered nor sandwiched between two bridges, but turns in a two-point bearing at the foot of its staff. The advantage of this construction is that a smaller rotating cage has less mass so it needs less energy to support its rotary motion. The rotating cage per se is also liberated from the weight of the screw balance: this further reduces the amount of necessary energy because the screw balance, which is isolated from the rotating carriage, is not disturbed by the inertia of the carriage. Compared to a traditional tourbillon construction, energy savings of approximatively 30% are achieved, while at the same time increasing the precision. This innovative construction derives its name from the Greek prefix “exo”, which means “outside” or “external”.

With this patented ExoTourbillon construction, Montblanc offers for the first time a stop-second function that directly halts the screw balance by means of a tiny spring. Such a construction rarely accompanies a tourbillon and is very useful whenever the wearer wishes to precisely set not only the hour- and minute-, but also the second-hand. Directly halting the balance in a tourbillon is a more precise construction than arresting the second-hand by halting the rotation of the tourbillon’s cage because the former instantly stops the balance and prevents the “after-swing” that can occur when the tourbillon’s cage is stopped. In order to precisely adjust the time, the tourbillon cage integrates a red marker in form of an arrow, which allows to read the seconds on the respective scale printed on the opening of the dial around the tourbillon.

 

 

 

 

 

Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph Vasco da Gama Limited Edition 60

 

Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph Vasco da Gama Limited Edition 60

Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph Vasco da Gama Limited Edition 60

Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph Vasco da Gama Limited Edition 60

Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph Vasco da Gama Limited Edition 60

Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph Vasco da Gama Limited Edition 60

Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph Vasco da Gama Limited Edition 60

 

 

Montblanc Heritage Chronométrie ExoTourbillon Minute Chronograph Vasco Da Gama Limited Edition 60

Ident. 112649

 

Movement Montblanc in-house Manufacture Calibre MB R230

Type of movement Mechanical movement with double barrel, automatic winding mechanism, one-minute patented ExoTourbillon with stop-second mechanism

Chronograph Monopusher with column-wheel and vertical coupling

Dimensions Diameter = 33.7 mm; height = 8.65 mm

No. of components 296

No. of rubies 44

Power reserve Approx. 50 hours

Balance Screw balance, diameter = 9.7 mm; moment of inertia = 12 mgcm

Frequency 21,600 A/h (3 Hz)

Hairspring Flat

Plate Rhodium plating and circular graining

Bridges Rhodium plating and côtes de Genève

Gear-train Special tooth profile improves the efficiency of the power transmission

Displays (Watch) Off-centre hours and minutes, Date on an off-centre subdial, Patented ExoTourbillon at 6 o’clock (one revolution per minute to indicate the seconds) with a rhodium-plated tourbillon bridge

Display (Chrono)  60 elapsed seconds and 30 elapsed minutes counters with double indication hands and corresponding sectorial scales

Special features Travel function with rapid reset of hour-hand and date display either forward or backward Tourbillon can be stopped by directly halting the balance wheel

 

Habillage

Case 18 K white gold, polished case with satin-finished interhorns, concave-shaped bezel for scratch protection

Crystal Scratch-resistant, domed sapphire crystal with antireflective treatment on both surfaces

Back Screwed 18 K white gold back with inset pane of sapphire crystal with Vasco da Gama’s flagship, the São Gabriel

Dimensions Diameter = 44 mm; height = 14.79 mm

Watertightness 3 bar

Crown 18 K white gold with Montblanc emblem in raised relief

Push-piece Monopusher at “8 o’clock”

Dial Upper part made of aventurine depicts the sky at night with the patented Montblanc diamond at “12 o’clock”and vertical satin-finished on the lower part Rhodium-plated sword-shaped hour-hand and minute-hand, date shown by a hand with a little red crescent at its tip on a blued guilloché flinqué wave pattern decoration on off-centre dial, chronograph with two counters with silver “filets” (one counter for 60 elapsed seconds at “8 o’clock” and a second counter for 30 elapsed minutes at “4 o’clock”) with double indication hands and corresponding sectorial scales

Wristband Black alligator-skin strap crafted at the Montblanc Pelletteria in Florence with 18 K white gold pin buckle

Limited Edition 60

Certified by the Montblanc Performance Test 500

Price 45’000 euros

 

 

 

 

Montblanc Heritage Chronométrie Quantième Annuel Vasco da Gama

 

Montblanc Heritage Chronométrie Quantième Annuel Vasco da Gama

Montblanc Heritage Chronométrie Quantième Annuel Vasco da Gama

Montblanc Heritage Chronométrie Quantième Annuel Vasco da Gama

Montblanc Heritage Chronométrie Quantième Annuel Vasco da Gama

Montblanc Heritage Chronométrie Quantième Annuel Vasco da Gama

Montblanc Heritage Chronométrie Quantième Annuel Vasco da Gama

 

 

Montblanc Heritage Chronométrie Quantième Annuel Vasco da Gama

Ident. 112537

 

Movement Calibre MB 29.18 (Sellita + Dubois Dépraz developed complication)

Type of movement Mechanical movement with automatic winding, annual calendar and a moonphase display with an aperture for a golden turning disc below featuring the moon in the night sky

Number of rubies 25

Power reserve Approx. 42 hours

Balance Flat hoop

Frequency 28,800 A/h (4 Hz)

Hairspring Flat

Displays Hours and minutes in the centre, one hand to indicate the month at “12 o’clock”, one hand to indicate the day at “9 o’clock”, one hand to indicate the date at “3    o’clock”, moonphase display on a subdial at “6 o’clock”

Special features Easy adjustment of calendar functions; individual correctors for each function to be set with a dedicated pin delivered with the timepiece

Habillage

Case 18 K red gold (5N); polished case, polished and satin-finish bezel

Crystal Scratch-resistant, domed and antireflective sapphire crystal

Back 18 K red gold (5N) with inset pane of sapphire crystal with the Vasco da Gama’s   Flagship São Gabriel and his signature

 

Dimensions Diameter = 40 mm ; Height = 9.55 mm

Watertightness 3 bar

Crown 18 K red gold (5N) with Montblanc emblem in raised relief

Dial Silvery white dial with sunburst pattern, facetted indexes, Arabic numeral “12” as red gold-plated appliqués, red gold-plated sword hour-hand and minute-hand, annual calendar with small blued steel hands, blued lacquered subdial at 6 o’clock, depicting the sky with the Southern Cross in the Southern hemisphere and an aperture for the moonphase indication

Wristband Black alligator-skin strap crafted in the Montblanc Pelletteria in Florence with 18 K red    gold  (5N) pin buckle

Limited Edition 238

Certified by the Montblanc Laboratory Test 500

Price 11’100 euros

 

 

 

 

Montblanc Heritage Chronométrie Quantième Complet Vasco da Gama

 

Montblanc Heritage Chronométrie Quantième Complet Vasco da Gama

Montblanc Heritage Chronométrie Quantième Complet Vasco da Gama

Montblanc Heritage Chronométrie Quantième Complet Vasco da Gama

Montblanc Heritage Chronométrie Quantième Complet Vasco da Gama

Montblanc Heritage Chronométrie Quantième Complet Vasco da Gama

Montblanc Heritage Chronométrie Quantième Complet Vasco da Gama

Montblanc Heritage Chronométrie Quantième Complet Vasco da Gama

Montblanc Heritage Chronométrie Quantième Complet Vasco da Gama

 

 

Montblanc Heritage Chronométrie Quantième Complet Vasco da Gama

Ident. 112539

 

Movement Calibre MB 29.16 (Sellita + Dubois Dépraz complication)

Type of movement Mechanical movement with automatic winding, full calendar and a moonphase display with an aperture for a golden turning disc below featuring the moon in the night sky

Number of rubies 25

Power reserve Approx. 42 hours

Balance Flat hoop

Frequency 28,800 A/h (4 Hz)

Hairspring Flat

Displays Hours and minutes in the centre, date indicated by hand around the dial periphery, day and month in a window at “12 o’clock”, moonphase display on a         subdial at “6 o’clock”

Special features Easy adjustment of calendar functions; individual correctors for each function to be set    with a dedicated pin delivered with the timepiece

Habillage

Case Stainless steel; polished case, polished and satin-finish bezel

Crystal Scratch-resistant, domed and antireflective sapphire crystal

Back Stainless steel with inset pane of sapphire crystal with the Vasco da Gama’s Flagship São Gabriel and his signature

Dimensions Diameter = 40 mm ; Height = 9.7 mm

Watertightness 3 bar

Crown Stainless steel with Montblanc emblem in raised relief

Dial Silvery white dial with sunburst pattern, facetted indexes, Arabic numerals “3,9,12” as rhodium-plated appliqués, rhodium-plated sword hour-hand and minute-hand, date-hand with a little red crescent at the extremity, blued lacquered subdial at 6 o’clock depicting the sky with the Southern Cross in the Southern hemisphere and an aperture for the moonphase indication

Wristband Black alligator-skin strap crafted in the Montblanc Pelletteria in Florence with stainless       steel triple folding clasp

Certified by the Montblanc Laboratory Test 500

Price 4’350 euros

 

 

 

 

The Montblanc Laboratory Test 500

 

Right from the beginning of the production process, the watchmakers in the Montblanc Manufacture in Le Locle do everything to uphold the superior quality of all individual parts of a timepiece. The manufacturing methods, the expertise and the love of meticulous detail ensure that the finished products meet Montblanc’s highest standards of quality. To guarantee the foremost level of performance of the Montblanc timepiece, the quality team of the Montblanc Manufacture developed and implemented a comprehensive testing program to assure the highest quality of the Montblanc watches before it leaves the Manufacture. The Montblanc Laboratory Test 500 simulates real life situation. The timepiece is precisely examined in a special laboratory and tested under conditions that recreate as closely as possible the environment that the watch will encounter when it is worn. The testing program consists of several phases, each of which is performed to meet the highest quality in the watchmaking industry. Instruments specially developed for Montblanc monitor and evaluate each test. The individual testing methods applied and the duration of the Montblanc Laboratory Test 500 testing period make this examination truly special in the world of fine watchmaking.

Test No. 1 Winding Performance and Assembly Control (duration: 4 hours)

Checking the winding performance of the watch and the correctness of the watch’s final assembly The flawless performance of every mechanical part of the timepiece is ascertained through its testing in a “Chappuis machine”, where, while being fully wound, is exposed to continuous rotations. The powerful rotary motions, which are much less gentle than those which a watch is ordinarily encounters on the wrist, expose the tested watches to strong vibrations, without overstressing the timepieces. The watches are placed inside little containers on the rotating arms of the Chappuis machine. The successive strong vibrations and rotations loosen any particles of dust. They also loosen any screws that weren’t sufficiently tightened during the watch’s assembly. The subsequent visual examination readily discovers the loosened screws, which can in a such rare case be now properly tightened.

Test No. 2 Continuous accuracy control (duration: 80 hours)

Ongoing monitoring of the rate in all positions This test is performed in the so-called “FEMTO” machine. Highly sensitive microphones rely on an acoustic method to measure various rate-related parameters. The individual mechanical functions of the impulse-stone, escape-wheel and pallet generate very characteristic and unambiguously identifiable sounds. The temporal sequence of these noises can be acoustically identified by sensitive detectors. The acoustically measured parameters are now converted and depicted in the form of graphic diagrams. This monitoring occurs in all positions: with crown left, down, right, and up while the watch is positioned vertically, and gain with crown right and crown down while the case is positioned horizontally. Examining the rate and detecting any deviations in the rate takes more than 80 hours.

Test No. 3 Functions Control (duration: 336 hours)

Testing the overall functioning of the watch During the so-called “Cyclo Test”, the watches undergo slight rotation in accord with a programme that was specially developed by Montblanc. This controlled rotary motion simulates the conditions that a watch ordinarily encounters in real life. The programme simulates active phases when the watch is worn on a wrist and dormant phases when the wearer has taken the timepiece off and set it aside. The test consists of cycles with the different functions e.g. a chronograph switched on and switched off. The power reserve is tested during each cycle, to ensure flawless functioning of the timepiece in all conditions.

Test No. 4 General Performance Test (duration: 80 hours)

Testing the momentary rate and the functions in all positions. This test examines the general performance of the watch in different temperature conditions: power reserve, the changing of its date display, the accuracy of its rate, and its additional functions. The fully wound watch is placed in an oven. The watch is not moved throughout the entire test, thus enabling the examiners to precisely scrutinize the power reserve. According to a predefined programme, the temperature inside the oven is varied between +6 and +45 degrees Celsius. These intense temperature variations simulate the temperature that a watch can undergo in daily use. This test examines the robustness under conditions like those it might encounter when its wearer travels to different countries and climatic zones. In addition to the ongoing testing of its rate as undertaken in Test No. 3, the momentary rate of the watch is tested in one of the watchmaking industry’s typical “PC10” devices to ensure utmost reliability. Other additional tests are made depending on the complication of the watch. For example, the push-pieces of chronographs are examined in a separate “function test” which measures the amount of force needed to trigger the buttons and their “action”, i.e. the length of the pathway which must be traversed prior to the moment when the push-piece triggers the function. The precision with which the chronograph measures brief elapsed intervals is also measured in all positions: crown left, down, right, and up while the watch is in a vertical position, and with the dial up and down while the watch is in a horizontal position. Another example would be the perpetual calendars for which the date and leap year changes are simulated manually by the quality inspectors who patiently turn the crown, hour by hour and check each month end that the correct date is set. This operation is repeated as to simulate a total of four years.

Test No. 5 Water Resistance Test (duration: 2 hours)

Testing the water resistance. To verify the water resistance of the case, the inspectors begin by testing to determine if the case is airtight. This is followed by a moisture test in which the case is placed atop a hotplate, warmed to a temperature of 45 degrees Celsius and then suddenly cooled by being sprinkled with droplets of cold water. If the underside of the sapphire crystal above the dial fogs up, the case is not watertight. Finally, the case is submerged in water to a depth of 10 cm. While it’s submerged, the pressure is gradually increased to 3 bar to simulate immersion toadepthof30m. By testing the timepiece for almost three weeks, Montblanc ensure the outstanding quality and reliability of the Montblanc watch allowing it to become a lifetime companion.