OMEGA REF. 2657 SC AUTOMATIC STEEL Omega, "Automatic", movement No. 10705718, Ref. 2657/2494 S.C. Made circa 1957. Fine, large and rare, self-winding, center seconds, stainless steel waterproof wristwatch with a stainless steel Omega buckle. Accompanied by the original fitted box. Notes DIAM. 36 mm. THICKNESS 10.5 mm.