That's it.
Actually, I was under the impression that MB was the company and Moldex was the model name (see unaltered photo above). Can anyone confirm either way?
Anyway, this was a prototype sporting car based on DKW 1000 mechanics built in Brazil by Roberto Stieler and Rodolfo Rivolta. It was first shown at the Sao Paulo motor show in 1961. At least two were built as you can see from the images below, and at least one (open) car survives