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Too bad we can't read the plate on #186.
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Not sure..., but on a reduced model 1:18 the Shelby Cobra Daytona Coupe #186 (André Simon - Maurice Dupeyron 24 sept 1964 Reims Gueux with licence plate 1E MFG 013 
It looks like that #186 Exoto die-cast is a likely match. I found this slightly blurry photo of #186 that appears to have the '1E' plate.
But, they can't be entirely trusted. At the August 1964 Goodwood event, csx2299 had a '1A' plate, but the diecast shows '1E'
Maybe Mike (honker) can ask for any September 1964 Tour De France photos on the French websites he visits?
I hoping Stephan (Szabo) can do the same on any German websites for the 1964 SPA and Nurburgring events (FIA Cobra's)?