Address: 1, Impasse del la Cite, Nevers.
Image (right) is a mid-1920s Hellessen manufactured by Louison. It has a 250cc Moser 4T engine, 3 speed gearbox, chain-chain and Terry seat. It was probably also available with a 350cc Zurcher engine.
There was Dobro-Motorist brand built in Germany in the 1920s, unrelated to the French marque.
Sources: forum.tontonvelo.com, Didier Mahistre.
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