1913 and 1915 Catalog
Dunbar Popcorn Wagon  -"Automobile Outfit"
Vehicle Chassis Type Unknown
Please Help Us Identify this Chassis.
The vehicle has 4 Cylinders, is Water Cooled, is 30-H.P., has a Selective Type Transmission, and is known as a unit type power plant. The ignition is both by battery and magneto. It has 32 inch wheels. 
The 1915 Catalog adds that there are 3 speeds forward and one reverse. Plus it has both a foot and emergency brake. Total weight of the machine is 4,000 pounds. 

Note how far back in the vehicle the driver is seated.

Dunbar Catalog Description of the Dunbar Popcorn Wagon - Automobile Outfit

From the 1913 Catalog