MOVEMENT:
mechanical hand winding, personalized to U-BOAT specifications for stem to be positioned at 9 o’clock.
Frequency: 21,600 vibrations per hour. Power reserve: 42 hours. 17 jewels.
FUNCTIONS:
hours, minutes.
CASE:
stainless steel AISI 316L, distinguishing patented crown on left side. Serial number plate fixed on the side of the case.Diameter 40 mm.
Bezel ring in polished tungsten. Thickness 9,50mm.
BACK:
sealed with seven external screws, opening U-shaped sapphire fumé crystal with movement view.
DIAL:
three superimposed dials, the upper one in black with luminous beige hands and markers. Visible ruby.
CRYSTAL:
high quality sapphire crystal with anti-reflective coating.
WATER RESISTANCE:
100 mt, 10 ATM.
STRAP:
handmade and hand-finished dark brown alligator leather. Stainless steel tongue buckle. Width: 20/18 mm.
Strap: ref. 7731/Z Buckle: ref. 7769
