A Brief History of the Marque
Société des Cycles et Motos Syphax, 1952-1953
6 rue de Coulmiers
Nantes (Lower Loire)
Models include a 175cc fourstroke machine (possibly powered by by AMC) with telescopic forks and swingarm rear suspension with hydraulic shock absorbers. Others were powered by 98cm3 Sachs engines and horizontal Ydral two-strokes.
Types 54 3v and 55 3v had AMC 3 speed 175cc engines, and 54 4v and 55 4v had 125cc AMC 4 speed engines. Types 55 had plunger rear suspension, types 54 were rigid. The 55 4v had a dual seat, with the other three having solo saddles.
Sources: jlbweb.fr et al