It is a 1-ton Panel that was converted to a Suburban-like mini-bus.
It is a very nice vehicle from 20'-30'.
Here is a discussion about this vehicle. (links to many photos are given in that discussion).
As I recall, it was built in Tarrytown, NY and shipped to S.A. Much later, it was shipped back to the U.S.A. (through Florida) to the present owner (who is in Canada).