The Savoie 651.3 watch movement is a manual wind movement that was in use around 1945. It is closely related to other calibres such as the Aurore-Villeret 120, Bulova 6AH, and FHF 120. The exact interchangeability of these calibres is unclear due to conflicting information in movement registers. However, it is known that the Bulova calibres have design differences from the FHF calibres and are likely sourced from Aurore-Villeret. It is worth noting that the numbers 120, 123, 132, and 172 may indicate different plate shapes, but specifics on these differences are not provided.