Exactly.
Humberto was the nephew of Rino Malzoni, well-known for his series of cars.
Rino had started building this car, based on a VW Karmann-Ghia, for his own use, but never finished it. Humberto took it over in 1969 and completed the work started by his uncle (who had already built the body), modified it a bit and called it the Casella II, the puzzle car. He used it as his daily car and no others were built.
Well done.