Omega Speedmaster '57 Chronograph "The 1957 Trilogy" 38.6mm 2017 [Preowned]Overview The Omega Speedmaster '57 Chronograph is a part of Omega's "The 1957 Trilogy" limited edition collection. The Speedmaster '57 was introduced in 2017, is a 60th anniversary tribute to the original broad arrow not only the first speedmaster but also the first chronograph in the world. Powered by a Lemania 1861 calibre and a 38. 6mm case this is a true remake of the original. This reference of the Speedmaster was introduced as a limited edition