A Prestige 532 Criterium Simplex rear derailleur from the 60's. It's the first plastic derailleur model made by Simplex (inspirered by the Juy Export 61). It could fit to your French bicycles. e.g. Peugeot, Gitane, Helyett, Mercier and others.
Everything in its original condition. Little patina. The gear derailleur works very fine.
100% original condition
All about vintage, classic road bikes and vintage bike parts from France and Italy.