One of Claudette's brake drums, badly repaired in the past by welding a piece of steel onto the cast iron.
Claudette in Jean-Louis' workshop.
You can hit this brake cylinder with a hammer and it still doesn't move.
Jean-Louis showing Simon just how much wear there is on Claudette's brake drums (the diameter is over 2mm more than the allowable variation from the spec).
Claudette and Célestine meet for the first time.