This is an NOS trunk lock striker plate, Ford part # B7A 7043252-A.  This Ford part # is stamped on the inside edge of the plate. `It was used on 1957 and 1958 Ford passenger cars and 1957 Thunderbirds.  Perfect for replacing a worn or missing striker plate.  We charge actual shipping and are always glad to combine shipping on several auctions or you would be welcome to pick it up at our shop.  Thanks!