U boat watch u 42 gmt limited edition 8095 gmt automatic mechanical personalized to u boat specifications for date display and stem to be positioned at 9 o clock third time zone frequency 28 800 vibrations per hour 4 hz power reserve 48 hours 25 jewels 50 mm titanium case charge axis stop crown lever with pin in titanium bezel runners and strap pivots in steel 316l aisi watertight on axis reset and assured charge by ptfe gasket bi directional rotating bezel in titanium lockabl