The Serie GRAND PRIX was a large scale 1:10 series created by Guisval approx. in 1970. It only contained 2 castings that are both ca. 44cm long and have plastic bodies. The "Bolido Grand Prix" mostly came out in yellow but also in white using the body of the "Bolido Grand Prix Electrico Dirigido" which is identical but steerable with a remote control. The "Super Chaparral G.T." was the second casting of that series and always came out in yellow and it came out either as a regular model without extra features or alternatively with a friction function creating engine noise while rolling. This series disbanded after a relatively short period of time and was on the market for maybe 2-3 years only and was visible inside the 1970 catalog only.