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.
New design of the 6497 movement: The snowflake.
New skeleton design based on the Unitas caliber 6497
Skeleton based on the Unitas 6497 caliber in a modern interpretation of the "Classic" model.
Skeleton based on the calibre Unitas 6497. Sun design.