Omega - Speedmaster 57 Omega Co-Axial Chronograph 41.5 mm - Steel And Yellow Gold Watch 331.20.42.51.02.001 Ultra-Thin - Mechanical - 38 mm - Rose Gold Medium Elasticity (one-sided stretched) and

Medium Elasticity (one-sided stretched) and Nonelastic (can not stretched )

The F1 Lithium is the result of a ground breaking project where Stewarts design team were asked simply to make the award winning X5 even better

38mm 18K rose gold case

One Piece Vibram Outsole

interchangeable full and sapphire-crystal back

Omega - Speedmaster 57 Omega Co-Axial Chronograph 41.5 mm - Steel And Yellow Gold Watch 331.20.42.51.02.001 Ultra-Thin - Mechanical - 38 mm - Rose Gold Medium Elasticity (one-sided stretched) and41. 5 mm stainless steel and yellow gold case, transparent back, 18K yellow gold bezel with tachymeter scale, scratch resistant sapphire crystal with anti reflective treatment on both sides, silver dial with a seconds sub dial at 9 oclock and a 12 hour and 60 minute chronograph recorder on the sub dial at 3 oclock, calibre 9300 self winding movement with a central chronograph seconds hand and a date window at 6 oclock, approximately 60 hours of power