Omega Speedmaster '57 Omega Co-Axial Chronograph Watch - 41.5 mm Steel Case - Brushed Bezel - Blue Dial - Brown Leather Strap - 331.12.42.51.03.001 PORTER blue external zone

blue external zone

Crafted with precision in mind

27 mm steel case

structured blue rubber strap

Omega Speedmaster '57 Omega Co-Axial Chronograph Watch - 41.5 mm Steel Case - Brushed Bezel - Blue Dial - Brown Leather Strap - 331.12.42.51.03.001 PORTER blue external zone41. 5 mm stainless steel case, transparent back, brushed bezel with with tachymeter scale, scratch resistant sapphire crystal with anti reflective treatment on both sides, blue 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.