The Felsa 4007N watch movement was manufactured from 1956 to 1963, featuring a pin-lever escapement with ruby pins and a detached manual wind mechanism. The ratchet on the dial side and crown mechanism with rocker bar enable convenient winding. Both the base movement and automatic module are designed with pillars, offering easy access to lubrication points for partial disassembly during maintenance. The manufacturing period and lack of records make it difficult to determine the age based on modifications, such as varying rotor shapes. This movement includes functions such as automatic winding and a sweep seconds hand.