A motor bicycle which used various engines, including those of their own manufacture.
Bourdache, p120, writes:
At the same time, Vigneron also sold a formidable 90 degree V-twin of 4 CV. In the 3 CV version only, it was proposed in an unusual way to "form a fixed engine that can operate sewing machines of all systems".
Bourdache pp 109, 120, 146.
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