The Girard Perregaux 42.3 watch movement features an excenter winding mechanism with a lever gear and a cam disc regulator. It incorporates Girocap combined settings for the escapement wheel. Additionally, this movement includes automatic winding, a sweep second function, and a date display that can be adjusted by changing the time between 22-24h. The Girard Perregaux 42.3 movement was commonly used around the period of 1960.