Back plates were made in the 1960s from a small company in Italy. Purchased at Liz's Antique hardware in LA in 2001. These are leftovers from a Bel Air Installation. Used in conjunction with baldwin door levers and also as a backplate for a closet with an additional nob. (not included). 16 available, one is predrilled for a Baldwin or similar. 15 undrilled and options are endless.