Vintage Antique Rex Anti-Slip Brake Wafers Automobile Gas Advertising Tin. This is a sweet little advertising tin for Rex anti slip brake wafers from the Armiger chemical company in Chicago, Il. Tin measures 2 1/8 inches tall roughly. The tin does have some wear with 1 major dent as you can see from the photos. I can’t get the top off the tin, but I can tell from the weight it feels full.