This is a pre-1963 fob advertising American Hoist Company's American Crawler Cranes and Excavators. The fob was given out as a premium by the Holekamp Equipment Company in St. Louis, Missouri. The address on the back of the fob uses a postal zone number rather than a zip code indicating that it was a pre-1963 item as that was when zip codes were first used. The fob is burnished brass colored metal and it measures 1 1/2 by 1 1/2 inch. Nice vintage advertising for construction and heavy equipment.