Seal Cove Auto Museum, Antique Autos and Motorcycles from the Brass Era, Mount Desert Island, Maine
1913 Thor Motorcycle

Many bike makers, including the original Indian, had their parts made by Aurora Machine & Tool Co. They also made Indian clones. In 1903 they founded Thor Motor Cylcle & Bicycle Company. They were influential in early design and racing. This is a rare rotary valve engine.