This tractor and trailer set was manufactured by Louis Marx and Company in the 1930's. They are pressed steel and feature clockwork mechanisms that are activated with metal keys. When wound, the rubber tracks move the vehicles forward. The set is made of aluminum with lithographed tin drivers and original box intact.
Ralph L. Tomlinson Toy Collection, "Learning Through Play" Exhibit in Leatherby Library
Chapman University, Leatherby Library, Ralph L. Tomlinson, toys, antique, antiques