ADDITIONAL FEATURES: 

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. Water tightness on the section of crown attached to the stem is ensured by an energized Polytetrafluoroethylene clipping gasket and a dual O-RING arrangement.