U-boat
24 NIGHTVISION

MOVEMENT: automatic ETA 2824, frequency 28.800 alternations/hour.
Crown on the left with a specially designed security device.
CASE: steel, AISI 316 L, diameter 53 mm
Back case sealed with screws, visible movement, special steel movement holder with particular holes to make it lighter.
DIAL: black with yellow hands and spheres
Arabic numbers.
Strap in calf leather, handmade in Italy.
RING NUT: external, removable for steel 316L filter change.
Glass: K1 glass with filters of exchange in optic glass and
PVD treatment in red colour.