Chronoswiss Lunar Triple Date

In the mid twenties the first wristwatches appeared whose faces were adorned with a prominently dimensioned, semi-circular moon window. At the same time there were models with a full calendar (date, day, month) and moon-phase indicator. It would most certainly be wrong to speak of great popular success in this context, but they did mark a trend that has lasted to this very day – with occasional interruptions.

The forties and fifties were just as much in the sign of the moon as were the eighties. The charming moon phase “complication” experienced a comeback within the course of the mechanical renaissance, and of course Chronoswiss was already in the midst of it all.

The name is no coincidence, for the moon, set against a deep blue night sky, passes through its light phases, dictated by the position of the sun, moon and earth, in an unusually large window. This is surrounded by the 31 calendar day numbers, which a small hand points to. Day and month are displayed near the “12”. As is customary at Chronoswiss, the solid silver face is designed with painstaking attention to detail.

The interplay of guilloche surfaces underlines the valence this wristwatch gains through the additional functions. The time, indicated in seconds, minutes and hours by Losange hands, is kept by the Chronoswiss exclusive Caliber C.931. But it has one feature that is only to be found at Chronoswiss: the skeleton rotor, yet another special Chronoswiss extra with a convenient additional benefit for the wearer: the calendar only has to be adjusted every two months, namely in the months with 31 days.

The Chronoswiss case that you know from the Lunar, waterproof up to 30 metres and with threaded wristband lugs, is available in platinum, gold, steel/gold and stainless steel. Face and movement are protected by reflex-free sapphire glass.

Technical details
References
CH 9320, platinum 950 (62g), limited edition (99 pieces)
CH 9321 W, 18ct. white gold (52g)
CH 9321, 18ct. gold (52g)
CH 9321 R, 18ct. red gold (52g)
CH 9322, 18ct. gold (12g)/steel
CH 9322 R, 18ct. red gold (12g)/steel
CH 9323, steel
CH 9323 bk, steel
* all versions available with black face

Displays
Hour, minute, second, moonphase,analog date, day and month in window

Case
Massive 27-part case, turnip crown,ø 38 mm, height 10,65 mm, smoothed and polished, screwed, decorative bezel with non-reflective sapphire crystal, screwed back with full thread and non-reflective sapphire crystal, screwed-on strap bars with patented Autobloc safety system, water-resistant up to 3 atm (30 m)

Movement
Chronoswiss Caliber C.931, Calendar watch with automatic winding, date and enlarge moon-phase displays, lunar disk with face,“Dubois  Depraz” cadrature, day-of-the-week and month displays, exclusive Chronoswiss, ø 26,60 mm (11½ ´´´), 21 Jewels, Incabloc shock-absorber, 42 hours power-reserve, 4 Hz., 28.800 vibrations per hour (vph), individually numbered

Dial
Massive, guilloché 925 Sterling-Silver dial,with printed Arabic numerals, blued, gilt or white varnished steel hands Breguet Losange

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