Omega Speedmaster '57 Co-Axial Chronograph Watch - 41.5 mm Steel And Yellow Gold Case - Silver Dial - Steel Bracelet - 331.20.42.51.02.001

41.5 mm stainless steel and yellow gold case, transparent back, 18K yellow gold bezel with tachymeter scale, scratch-resistant sapphire crystal with anti-reflective treatment on both sides, silver dial with a seconds sub-dial at 9 o’clock and a 12-hour and 60-minute chronograph recorder on the sub-dial at 3 o’clock, calibre 9300 self-winding movement with a central chronograph seconds hand and a date window at 6 o’clock, approximately 60 hours of power reserve, stainless steel bracelet with 18K yellow gold. Water resistant to 10 bar.