Omega - Speedmaster Moonwatch Professional 42 mm - Stainless Steel - Transparent Back Watch 3876.50.31

42 mm stainless steel case, transparent back, tachymeter bezel, scratch-resistant sapphire crystal with anti-reflective treatment inside, black dial, manual-winding Omega 1866 movement with chronograph, small seconds, and moonphase, approximately 48 hours of power reserve, black leather strap. Water resistant to 50 m.