Here is the list of movements based on the Unitas 6497 calibre. It is a size 16" 1/2. It is widely known and used in many models and shared by many watch brands.
Skeleton based on the Unitas 6497 caliber in a modern interpretation of the "Classic" model.
Skeleton based Unitas caliber 6497 having decentered rays.
Skeleton based on the calibre Unitas 6497 looking like turinig blades.
Skeleton with a classical cutting and a floral decoration.