automatic mechanical chronograph personalized to U-Boat specifications for date display and stem to be positioned at 9 o’clock. Frequency: 28.800 vibrations per hour, 4 Hz. Power reserve: 44 hours. 25 jewels. Height: 7 mm.
hours, minutes, second hand chronograph, counters small seconds at 3, counter 12 at 12, counter 30 minutes at 6. Date window at 9 o’clock.
in black ceramic, shiny finish, with internal steel container. Diameter 50 mm. Special crown protection device on the left side.
sapphire fumé see-through, 7 screws in. Personalized rotor, in silver, build with a base and 3 bridges fixed with blue screws.
black matt with silver coloured hands and indexes (in high relief). Arabic numbers.
sapphire, scratchproof, fumé, 2,00 mm thick.
100 mt, 10 ATM.
hand made and hand finished alligator leather, square scale, black, 3 circular cuts out with ray leather inset black tongue buckle in steel IPB, with U-Boat personalization. width 23/22 mm, fasten to the case with screws.
50mm – ref. 7387 D – $7,600