1931 Ford Model A Mail Truck
The Ford Model A Mail Truck was actively used by the USPS starting in 1928. Mail service was a natural fit for a truck chassis that served various designs, including mail trucks, ambulances, and even funeral coaches.
In this case, the United States Postal Service used a fleet cab design and then brought in custom builders to finish the design for what became the Ford Model A Mail Truck. If you want to see a fully restored Ford Model A Mail Truck, you can visit the National Postal Museum in Washington, D.C.