Omega Speedmaster '57 Omega Co-Axial Chronograph Watch - 41.5 mm Steel Case - Brushed Bezel - Silver Dial - Brown Leather Strap - 331.12.42.51.02.002 Medium 40mm Rolesium case comprised of

40mm Rolesium case comprised of Oystersteel and platinum

bold blue dial made of an OMEGA patent-pending material

fluted 18K yellow gold crown set with a synthetic cabochon-shaped spinel

18K sedna gold bezel paved with snow-set diamonds

33 mm stainless steel case

Omega Speedmaster '57 Omega Co-Axial Chronograph Watch - 41.5 mm Steel Case - Brushed Bezel - Silver Dial - Brown Leather Strap - 331.12.42.51.02.002 Medium 40mm Rolesium case comprised of41. 5 mm stainless steel case, transparent back, brushed bezel with with tachymeter scale, scratch resistant sapphire crystal with anti reflective treatment on both sides, silver dial, self winding chronometer Omega 9300 movement with Co Axial Escapement, chronograph, date, and small seconds, approximately 60 hours of power reserve, brown leather strap. Water resistant to 100 m.