This is a vintage sterling silver Mickey Mouse lapel pin/ tie tack. It is marker sterling on the back (9.25 silver). Disney is the official copyright stamp, confirming it is an officially licensed Disney piece. The marks "SF" on the back, are the manufacture's hallmark. "S" and "F" split by a small sword or staff logo. This indicates it was produced for Disney by a specific mid-to-late 20th century jewelry manufacture. It is a wonderful, high quality piece of vintage Disney memorabilia! Cash required.