View of amphibious tractor. Label on back: "Amphibious tractor. This sturdy amphibious tractor will travel on either land or water and is the latest implement of warfare with which the U.S. Marines are provided. They cannot be stopped by shallow water, mud, swamp, marsh, barbed-wire entanglements or other obstacles. Many of these tanks were recently subjected to exhaustive tests in Florida waters." Stamped on back: "Official photograph. Please credit U.S. Marine Corps."
