1936 Wienermobile:

The nephew of Oscar Mayer, Karl G. Mayer, had a prolific idea in 1936 to help promote the company's hot dogs. This was the first of a long history of Wienermobiles.

Wienermobile Specifications, 1936:
Builder: General Body Company of Chicago, Illinois
Cost: $5,000
Bells and Whistles: 13 feet of metal in the shape of an Oscar Mayer Wiener, open cockpits in center and rear of vehicle