When we talk about the chronograph watches, the Omega Speedmaster is easily one of the most popular. However, in fact, the Speedmaster is a greatly varied collection and distinguishing between different Speedy models can sometimes be a little overwhelming. So currently, we’ve picked two famous versions, the Omega Speedmaster Professional Moonwatch and the Speedmaster ’57, to test further, so that we can highlight their origins, differences and similarities.
The Omega Speedmaster was the first chronograph to move the tachymeter scale from the dial to the bezel for better legibility. While later models included printed bezel inserts, that very first Speedmaster had an engraved steel bezel, which is now the defining feature of modern Speedmaster ’57 watches.
Omega first introduced the Speedmaster chronograph particularly for motorsports in 1957 as part of a trilogy of professional replica watches – the other two were the Seamaster 300 dive watch and the Railmaster antimagnetic watch. And the nowadays Omega Speedmaster’ 57 collection is a tribute to that real maiden reference. 
Another common design trait across all Speedmaster ’57 watches are round symmetrical cases with straight lugs and no crown guards. Other nods to the first Speedy found across some Speedmaster ’57 models consist of the Broad Arrow hands, the three-link steel band, and beige-colored lume to mimic the patina that develops with age.
But, different from the original 1957 Speedmaster, the contemporary Omega Speedmaster ’57 features bigger cases measuring 41.5mm cases and automatic Co-Axial movements. The option of movement also means a dial redesign to include only two sub-dials at 3 and 9 and a date window at 6 o’clock. What’s more, though the Speedmaster was originally only offered in stainless steel, Omega makes Speedmaster ’57 models in a range of materials including steel, gold, and two-tone configurations.
The exception to the above design details is the special 60th Anniversary Speedmaster ’57. Unveiled in 2017, this limited edition commemorative watch is essentially a reissue of the 1957 Speedmaster, complete with a 38.6mm steel case, matching steel bracelet, tri-compax dial, and a manual-wind movement inside.
The only exception is the special 60th Anniversary Speedmaster ’57.The limited-edition commemorative replica watch, which was launched in 2017, is essentially a reprint of the 1957 Speedmaster and features a 38.6mm steel case, matching steel strap, and a three-in-one dial with a manual air drive inside.