DISRAELI DOCUMENTS

Spanish Utility Model # 9,206 - Triplex

Spanish Utility Model 9,206 - Triplex main image

This is a registration for a ‘Utility Model’ - a kind of patent-lite. It covers a, rather fanciful, rack-and-pinion, Triplex derailleur and dates from 1943 - making it the earliest record of a Triplex derailleur that I have yet seen.