A had a breakthrough on an original mystery with this collection.
After spending hours searching for information on Car 33, I stumbled across a toy car on eBay.
Car 33 was identified as a Renault 4CV. I don’t know anything about Renault, so I tried reviewing 4CV images all of which were coupe / sedans. This took me down many Internet avenues. Was it a Fiat with Abarth, Allemano, Zagato body work, a Sunbeam?, a Nardi? I wasn't finding anything definitive.
I even got some completely false information via Google AI that concatenated different facts into a story (hallucination).
But, my picture of 33 I have is not a Renault 4CV coupe, but rather more sports car like.

What I came to understand is that similar to the Fiat ecosystem various coach builders and “tuner” companies would use the 4CV as a base to build upon.
I finally ran a search that came back with a picture of a toy car in blue with 33 on eBay. It looked like a match for my picture. Now I had some better keywords to work with; Izoard Pichon-Parat.
What I came to understand is that similar to the Fiat ecosystem various coach builders and “tuner” companies would use the 4CV as a base to build upon.
I finally ran a search that came back with a picture of a toy car in blue with 33 on eBay. It looked like a match for my picture. Now I had some better keywords to work with; Izoard Pichon-Parat.
Pichon-Parat was a French coach builder who built sport models with original bodywork over established models of cars from Renault, Citroen, Peugeot and others.
— From Wikipedia
The Col d'Izoard is a mountain pass in the Alps. In 1955 Pichon-Parat unveiled the Izoard Pichon-Parat 4CV; a sports car with a body designed by Pichon and built on the Renault 4CV platform. The original two-door berlinette had gullwing doors and aluminium bodywork.[12]
The car was raced in various rallies and appeared in the 1956 Mille Miglia.
In 1956 a cabriolet version was launched.