|Mack Bulldogs fitted to the Mack trucks. The small one is known as the pup and is marked around the collar Mack JR it was fitted to the Mack half ton pick-up trucks. Made from die-cast zinc and chrome or gold plated. This well-known Bulldog emblem was designed and patented by A.F. Masury in 1932. It was not until on or around that time the company started fitting them to their radiator caps. Masury was killed in an accident in 1933.