Issued by "ADAC" German Automobile Club. Lettering around the plaque "ZIELFAHRT 21.10.1928 - CLUB FÜR MOTORSPORT - MÜNSTER (WESTF.)". Each corner with a hole to mount the plaque. Maker marked on back.
No damage to the enamel.
Standing correctly, it is 3.5 inches by 3.5 inches.