The Girard Perregaux 41.0 watch movement, used from 1972 onwards, features an indirectly driven minute allowing for a large balance and low profile. It utilizes a barrel with jewel bearings and is compatible with the ETA 2671 casing. This movement also includes a variety of functions such as automatic winding, sweep seconds, and a date feature that can be set by changing the 23-24-hour marker. Additionally, it incorporates Incabloc Shock Protection for increased durability.