This Omega is 41 mm platinum case, transparent back, domed scratch-resistant sapphire crystal anti-reflective treatment on both sides, sand-blasted 950 platinum Pie Pan dial is reminiscent of the first 1952 Constellation model, Caliber Omega 8923 self winding movement with co-axial escapement, annual calendar, chronometer, date, approximately 55 hours of power reserve, green leather strap. Water resistant to 10 bar (100 metres / 330 feet).