Price list 22 is dated January 1956. Price list 24 is February 1957. Price list 25X is January 1957 - so my guess is that this document numbered 23X dates from 1956.

• Publisher: Simplex
• Country: France
• Date: 1956?
• Derailleur brands: Simplex
• Derailleurs: Simplex Tour de France, Simplex Juy 51, Simplex Juy 543, Simplex 303 Tourist, Simplex Grand Tourisme