MOVEMENT: automatic chronograph ETA 7750, frequency 28.800 alternations/hour
Crown: on the left side, with a specially designed security device.
FUNCTIONS: hours, minutes, seconds, date with immediate adjustment. Date positioned at nine o’clock.
CASE: steel AISI 316 L, IP treatment, diameter 50 mm and 55 mm
Back case sealed with screws, visible movement, special steel movement holder with particular holes to make it lighter.
DIAL: black with hand and spheres available in white, yellow, orange.
Arabic numbers.
Water-resistance: 10 ATM
Glass: Specially cut ultra dimension in highly resistant K1 glass
Strap: calf leather, handmade in Italy, exclusive aero design
IP Treatment: Highly resistant, vacuum scientific application.
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 "U-boat 21 FLIGHTDECK CAB O Ø55")