Omega Speedmaster '57 Omega Co-Axial Chronograph Watch - 41.5 mm Grade 5 Titanium Case - Brushed Bezel - White Dial - Brown Leather Strap - 331.92.42.51.04.001 IW503504 Calibre Omega 3203 manual-winding chronometer

Calibre Omega 3203 manual-winding chronometer movement with chronograph and small seconds

black transferred Roman numerals with satin-brushed sunray finish

05mm 18K pink gold case

5 mm 18K white gold case with helium escape valve

small seconds at 9 o'clock and central chronograph seconds and minute hands

Omega Speedmaster '57 Omega Co-Axial Chronograph Watch - 41.5 mm Grade 5 Titanium Case - Brushed Bezel - White Dial - Brown Leather Strap - 331.92.42.51.04.001 IW503504 Calibre Omega 3203 manual-winding chronometer41. 5 mm grade 5 titanium case, transparent back, brushed bezel with with tachymeter scale, scratch resistant sapphire crystal with anti reflective treatment on both sides, lacquered white dial, self winding chronometer Omega 9301 movement with Co Axial Escapement, chronograph, date, and small seconds, approximately 60 hours of power reserve, brown leather strap. Water resistant to 100 m.