Triplex do love a nasty, pressed steel, derailleur with plenty of badly finished, sharp, edges and rivets on the verge of a nervous breakdown.

• Publisher: Oficina Española de Patentes y Marcas
• Inventor: Guillermo Bascaran Iturrioz
• Country: Spain
• Date: Spanish application filed January 1974
• Derailleur brands: Triplex
• Derailleurs: unknown