This article shows two Huret derailleurs:

• A single-pulley Huret Course Pro. This is an early model with round pusher plates either side of the pulley.
• A double-pulley Huret Touriste, which uses essentially the same mechanism as the Course Pro but has a second pulley mounted on a sprung arm.

(Source gallica.bnf.fr/ Bibliothèque nationale de France)

---

• Publisher: L'Officiel A.C.M.
• Country: France
• Date: April 1937
• Derailleur brands: Huret, BSA, Fichtel & Sachs
• Derailleurs: Huret Course Pro, Huret Touriste