Gege Blog 23.1 RS Braking System (f).pdf
3) And the pedal of the A box, original of the car, as well as all the bizarre linkage which intrigued us so much, comes from the
system "RS" which also makes it possible to couple the braking on transmission and on rear wheels by pedal to the foot. A very
ingenious system, where the "hand" brake lever only serves as a ... parking brake!
This is also why the rear brake rod on André's chassis is on the left and not on the right:
André therefore tested this assembly on the housing of the F box which is at home, and it is extremely interesting: