This Spanish Utility Model, from 1958, builds on the 1951 design described in Spanish Utility Model # 27,560. The 1951 design is a straight copy of a Huret Compétition. This 1958 variant has a shorter, racier, pulley cage - a little remiscent of the pulley cage on a Simplex JUY 51.

I have never seen an example of a Triplex derailleur with this cage. But I have seen an Argentine derailleur that is similar.

• Publisher: Oficina Española de Patentes y Marcas
• Inventor: Antonio Bascarán Rementeria
• Country: Spain
• Date: Priority date May 1958
• Derailleur brands: Triplex
• Derailleurs: unknown