This is an interesting image. It clearly shows a Huret Challenger - but it is one with two unusual features:
It has a very small logo on the outer parallelogram plate - rather reminiscent of the logo on a Jubilee.
The cable clamp bolt is mounted on one of the parallelogram pivot pins. This is different from all the Challengers that I have ever seen - which have the cable clamp mounted on the outer parallelogram plate.