A Brief History of the Marque
Manufactured by Charles Gerald
In the early 1920s, Charles Gérald was a well-known agent for Koehler-Escoffier in Paris. In 1924 he launched a motorcycle under his own name, the Charles Gerald, a machine which differed little from many other lightweight two-strokes on the market.
The engine is a two-stroke L.P.L. of 125cc (52mm x 58mm b/s) with a Longuemare carburettor. It has a 5 litre fuel tank and takes a 10% mixture of oil and petrol - a very high amount by current standards but common for the time. It is a single-speed machine with direct drive from the crankshaft pulley to the rear wheel.
Model D 175 cc 2T
Model F 250cc 2T
Model H 500cc 2T
Sources: zhumoriste.over-blog.com, cyclememory.org