automatic mechanical, personalized to U-BOAT specifications for stem to be positioned at 9 o’clock.
Frequency: 28,800 vibrations per hour, 4 Hz. Power reserve: 38 hours. 25 jewels.
hours, minutes, seconds.
in titanium, diameter: 53 mm. Charge axis, stop crown lever (with pin in bronze), stop glass handles,
bezel runners and strap pivots in steel AISI 316L. Watertight on axis reset and assured charge by PTFE gasket.
Bi-directional rotating bezel, in titanium, lockable with a lever on the right side of the case fixed and secured with 3 screws,
special shape. 12 o’clock ball indicator on the bezel made of ceramic.
in titanium, fixed on case with 6 encapsulated hexagon screws in steel.
matt black, markers treated with superluminova (peach color). Bâton hands, treated with superluminova.
300 mt, 30 ATM.
hand made and hand finished calf leather, carefully selected and processed following the traditional handcrafted techniques
used in the 1800’s, which give the strap a naturally distressed feel and look. Tongue buckle in titanium. Width: 23/22 mm.
This astonishing and exceptionally rare model was designed with a reinvented hand winder made from the same Grade-5 titanium that was used for the case back, case and bezel. All engravings on this piece are carried out by mechanical pantograph, including the brass dial with serial number plate, which is galvanized and finished with a bright enamel paste. The pressure resistance of this piece is tested in an autoclave at 40 bar before the final assembly is completed. The U-42’s winding crown is built in two parts: one attached to the movement stem and the other hinged to it with a pivot. This creates a flexible joint that allows the crown to protrude considerably from the watch for winding and setting, yet returning it to a protected, hidden position, diminishing side clutter, when in action. This type of crown is absolutely necessary for activities during which gloves are required, such as underwater operations and environmental activities in Arctic temperatures. Watertightness on the section of crown attached to the stem is ensured by an energized Polytetrafluoroethylene clipping gasket and a dual O-RING arrangement.