French auxiliary motor for mounting on luggage rack. This is a Serwa mounted on a French Terrot bike. Serwa started building their first model type 75001 in 1946. This model was replaced in 1949 by 75002. Special about this type is that it is a 38cc 4 stroke engine with OHV's and that this engine had 2 gears. These were operated by a handlebars through which the engine was tilted and one or the other driving wheel in the pulley grabbed the rear wheel.

Engine is completely disassembled and in good running condition. Rarely these OHV's are offered.