Equipped with the in house developed UN-153 calibre featuring the silicium balance-spring, the Marine Chronograph Annual Calendar is an innovative, simple to use, complication timepiece incorporating stop watch and calendar functions.
The Marine Chronograph Annual Calendar mechanism contains only a dozen elements. In a development of the simple calendar developed for the UN-118 caliber, the annual calendar needed only three additional wheels—a challenge that personifies the spirit of Ludwig Oechslin. The new UN-153 caliber is manufactured entirely in-house and beats at 28,800 vibrations per hour, proof of its extreme precision. As for the silicon balance-spring and escapement, they are provided by the company Sigatec, which is co-owned by Ulysse Nardin.
Model: Marine Chronograph Annual Calendar
In-house designed movement
Silicium escapement and spring, 28’800 v/h
Power-Reserve: approximately 52 h
Chronograph with seconds hand in the centre
30 minutes counter at 3 o’clock
12 hours counter at 6 o’clock
Small seconds counter at 9 o’clock
Annual calendar, backward/forward setting, withmonths counter at 9 o’clock
Date at 6’clock
Bezel: fluted, stainless steel
Crown: screw down security crown, covered with rubber
Diameter: 43 mm
Water-resistance: 100 m
Crystal: anti-reflective sapphire crystal
Case-back: open case back with sapphire crystal
Egg shell or blue with roman numerals
Leather strap with folding buckle
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