Omega Speedmaster Moonwatch Co-Axial Master Chronometer Moonphase Chronograph Blue Side Of The Moon Watch - 44.25 mm Blue Ceramic Case - Blue Ceramic Dial - Blue Leather Strap - 304.93.44.52.03.00144. 25 mm blue ceramic case, transparent back, bezel ring with Liquidmetal tachymeter scale, scratch resistant sapphire crystal anti reflective treatment on both sides, blue ceramic dial includes 18K white gold indexes and hands, tachymeter scale, Caliber Omega 9904 self winding movement with chronograph, chronometer, moonphase, approximately 60 hours of power reserve, blue leather strap. Water resistant to 5 bar (50 metres 167 feet).