Aluminum buckles used by Officer's (the open faced claw buckle style was also used). These are new, very good quality reproductions.
Note-these will not fit the standard EM, Tropical or M44 belts. The officer belts are designed differently and must be custom made- the "female" hook must be sewn in. This piece is included, but you must know how to make your own belt- unless you only wish to display the buckle on its own.