The Omega 1010 is a watch movement that was used from 1956 to 1963. It features a pin-lever escapement with ruby pins and a detached manual wind mechanism. The ratchet is located on the dial side, and the crown mechanism includes a rocker bar. Both the base movement and automatic module employ pillar designs, allowing for easy access to most lubrication points during maintenance. Notably, there are no known differences between the 57/21 and 57/21a, and similarities also exist among various samples of the 51/21. The watch movement incorporates sub second and automatic functions.