U-BOAT Flightdeck Ref. 7287 - Silver 925 MARTELLEE 50 MM DIAMOND

MOVEMENT: 
automatic mechanical chronograph modified and personalized at U-Boat specifications for date display and stem position at 9 o'clock. Frequency 28.800 vibrations per hour, 4 Hz. Power reserve 44 hours. 25 jewels. Height 7 mm.

FUNCTIONS: 
hours, minutes, small second, chronograph 60 s, counter 12 at 12, counter 30 minutes at 6. Date window at 9 o'clock.

CASE: 
sterling silver, refinished by hand using the traditional artisanal techniques, martellée finishing. Crown on the left side with a special protective device and push buttons in sterling silver.
Diameter 50 mm. Silver weight 119,15 g. Thickness 17,90 mm.

BACK: 
see-through, sealed with 7 screws.

DIAL: 
black in carbon fiber, with hands and markers in white colour. Arabic numerals, in high relief.

CRYSTAL: 
sapphire, highly resistant, fumé.

WATER RESISTANCE: 
50 mt, 5 ATM.

STRAP: 
Calf leather with precious inset in silver. Hand made and hand finished, with sterling silver tongue buckle.
Width 23/22 mm, hypoallergenic and colour retain treatment. Fasten to the case with screws.