Like many other manufacturers (Tissot for example), Omega employed the ESA 9162 tuning fork movement in many of their watches. These Omegas were usually referred to as the F300 Hz models reflecting the frequency of the tuning fork. The F300s must have been produced in the tens of thousands and are often seen on popular auctions sites today.

The ESA 9162 is often considerd the "Rolls Royce" of tuning fork movements. It was designed by Max Hetzel, who had previously worked for Bulova; he was also responsible for the Accutron 214.