1 1/2″ high x 2″ wide x 1 1/4″ case diameter. Brass body. Brass and steel dial. “PAT.FEB.18-08 OTHER PAT. PEND.” is stamped on the top of the body. “ROCHESTER SAFETY LOCK CO ROCHESTER INDIANA” is stamped on the obverse of the shackle.Patent #879747 US Patent #904182.