Super lot with 4 different antique "twinkle" buttons that have brass over tin mirror backing. All 4 of these buttons have tin metal backs with hump shanks. One is a fabulous marquise shape measuring 7/8" long. There is one of the round ones that is 7/8" marked "TCHECOSLOVAQUIE" on the back. The other 2 round buttons unmarked, and although lovely on top, these 2 have some rust on back.