U-77 automatic mechanical chronograph, personalized to U-BOAT specifications, with date display and stem positioned at 9 o’clock.
Frequency: 28,800 vibrations per hour, 4 Hz. Power reserve: 44 hours. 25 jewels.
hours, minutes, small seconds, 60 s chronograph, 12 h counter at 12 o'clock, 30 min counter at 6 o'clock, date.
sandblasted black ceramic with a shiny bezel, internal steel case. Diameter 50 mm. Distinctive crown on left side with patented protection device. Serial numbering between the lugs. Thickness 17 mm. Weight 140 gr.
see-through, screwed in. Personalized silver rotor consisting of a base and three bridges fixed with blue screws.
black matt with brown hands and indexes in high relief. Arabic numerals.
sapphire, scratchproof, thickness 2 mm.
100 mt, 10 ATM.
hypoallergenic rubber with gold brown alligator applied inlay. Black tongue buckle in steel with U-BOAT personalization. Colour retention treatment. Fastened to the case with screws. Width 23/20 mm.