Omega Seamaster Diver 300M Master Chronometer Mens Watch 210.22.42.20.03.002. Caliber Omega 8800 automatic co-axial movement with 55 hours power reserve, and central seconds hand and round index hour markers. Blue ceramic dial featuring laser-engraved waves and a date window at the 6 o'clock position. Blue ceramic bezel with Ceragold diving scale, set on a 42mm anti-magnetic stainless steel / 18k Sedna gold case. Helium-escape valve at 10 o'clock position. Sapphire crystal on top and an exhibition case-back. Water resistant to 300M. Blue Omega rubber straps with stainless steel buckle.