|Two 1929-32 Caps. The one on the left is the large smoothed rim version and on the right, the large ornate rim version with a 3.25 inch internal thread. This one also has a threaded hole on the top for attaching the Goddess Of Speed hood ornament. Both are chrome plated die-cast zinc, produced by the Doehler Die Casting Co. Toledo, Ohio USA. Patent No. 77,603.