Antique Boyce Studebaker Moto-Meter with four patent dates. First date is May 3, 1913 and last date is Aug. 15th, 1918. The Studebaker name on back is worn but you can read it. I bought it years ago from the man who originally owned the vehicle it was on. It is worn because it was used. I have not tried to clean it up. I really don't know much about it or how or if it works. This item is sold as is. Happy Bidding!