The Omega 30SC watch movement is an open face calibre with a pin-lever escapement. The movement provides various functions, including a 60-second (0.2-second) counter, a 30-minute counter, and a pillar wheel. It also incorporates an addition timer with a pusher, a flyback function, a stem winding mechanism, and a center second hand. The watch movement was commonly used around 1970 and is designed with the pendant mounted on the movement.