My memory's going, and I usually need a clue. Its so infuriating when you recognise the shape, but can't remember the name. I was even looking through the Tour Auto entry lists.
The JS stand for Jo Schlesser, and old friend of Liger who died in 68? at Rouen, when the magnesium air cooled Honda caught fire. Another reason to dislike Rouen.
The circuit was a road circuit, half way between the cow roundabout and the start of the N138. Just some nice roads in the countryside. The pits and grandstand were knocked down a few years ago