The Citizen 1120 is a watch movement that was in use around 1955 and offers several notable features. It is equipped with a jewel-bearing rotor and a sophisticated excenter self-winding mechanism that operates with just one gear stage. The movement includes an easy-to-operate rotor lock. Early samples of the Citizen 1120 had a slip spring, while later samples featured a fixed mainspring and a friction clutch on the pawl wheel. The movement incorporates automatic winding and sweep second functions.