Auburn Rubber Co, made between 1935-1959
Started in Auburn, Indiana, in 1913 as the Double Fabric Tire Company, it made tires for the Auburn Automobile Company. In the 1920s, the company changed its name to the Auburn Rubber Company, phased out its production of tires and introduced new products such as shoe-soling sheets. In 1935, it began making rubber toys, including toy cars, trucks, tractors and animals. Most vehicles were four to eight inches in length and cast in a variety of colors. During World War II, the company made soles for combat boots and gaskets for so-called "jerry cans."
Utility and service vehicles in the small size were also popular such as a fire engine, a telephone truck (it looked like a Dodge) with two ladders on top, and a flat bed truck. Police cars (molded in blue) and fire chief cars (molded in red)
http://en.wikipedia.org/wiki/Auburn_Rubber_Company
http://www.toycollectormagazine.com/index.php?Itemid=62&catid=34:features&id=142:auburn-rubber-toys&option=com_content&view=article
There are several Auburn firetrucks on ebay.