Derny 1938

"Derny was designed and constructed by two French ex-racing cyclists called Roger Derny and Sons. This was the conventional motos de stayer (...). These type of pacing machines used first for the Bordeaux-Paris were not very reliable for road use. So another type of pacing machine had to be designed. And as a result the Derny was born and put into production in 1938. The Derny brothers first factory was at 81, Avenue St. Mande and later they moved to Avenue du General Bizot, both in the French capital.

When the parent factory closed in 1956, Derny machines for the Bordeaux-Paris were maintained and rebuilt by Service Derny of 88, Rue Picpus, Paris until 1974. Derny carried on making other types of machines but closed in 1958.” from http://motorbike-search-engine.co.uk