Jean Debuire's Zundapp engined special. It was s little large and a little under-powered to achieve success.
Some results for Jean:
Montlhéry 30th April 1950, DNF Avus 1st July 1951, 12th in heat, 13th in final Nürburgring 29th July 1951 German Grand Prix, 23rd Grenzlandring 9th September 1951, DNF Namur 20th July 1952, 6th in consolation heat Montlhéry 28th September 1952, 4th
Montlhéry 30th April 1950, DNF
Avus 1st July 1951, 12th in heat, 13th in final
Nürburgring 29th July 1951 German Grand Prix, 23rd
Grenzlandring 9th September 1951, DNF
Namur 20th July 1952, 6th in consolation heat
Montlhéry 28th September 1952, 4th
If you know more, please get in touch.