Omega Speedmaster '57 Omega Co-Axial Chronograph Watch - 41.5 mm Steel Case - Brushed Bezel - Silver Dial - Brown Leather Strap - 331.12.42.51.02.002 135 Calibre Omega 8913 self-winding co-axial

Calibre Omega 8913 self-winding co-axial master chronometer movement

55mm thick

shiny black alligator strap with prong buckle

brown ceramic dial with 18K Sedna™ gold numerals

hours and minutes of mean solar time

Omega Speedmaster '57 Omega Co-Axial Chronograph Watch - 41.5 mm Steel Case - Brushed Bezel - Silver Dial - Brown Leather Strap - 331.12.42.51.02.002 135 Calibre Omega 8913 self-winding co-axial41. 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.