The Elgin 420 is a mechanical watch movement featuring a pin-lever escapement and a ratchet on the dial side. It incorporates a crown mechanism with a rocker bar for convenient time setting. To ensure durability, the movement employs shock protection through elastical spiral-shaped balance spokes. A notable characteristic is the separate driving mechanism for the train and hand gear, which are both powered by the barrel. The Elgin 420 movement is manually wound and equipped with a sweep second hand. It utilizes a pin lever system and was commonly used around the 1960s.