331.53.42.51.02.001Ref

The Speedmaster 57 is a modern tribute to Omega's first-generation Speedmasters, featuring a case with straight lugs and a bezel engraved with the tachymeter scale. These features were present on early versions of the iconic chronograph, while later models have the swirling 'lyre' lugs and a separate-inlay bezel still in use. Reference 331.53.42.51.02.001 has a yellow gold case, alligator strap, and is powered by the 'deluxe' caliber 9301.