Yes, that is correct.
When the production of the Gutbrod Atlas started, the platform truck got a cab built by Vischer, while the van had a Binz body. After a few months, the platform truck got its cab from Binz also, easily identifiable by the three bars at the front and the one-piece windshield. Until the discovery of the puzzle car last year, only one surviving Vischer bodied Atlas was known. It is pictured below, together with a period Vischer pic and a Binz bodied Atlas.