Cockerell

Auxiliary engine 32cc, 0.3HP, designed in 1925 in Munich by German engineer Fritz Gockerell.

"Fritz Gockerell died in Munich in 1965 after a lifetime of researching, designing, inventing and developing innovative engines. But he is not well-known and did not benefit financially from his inventions – they were not commercial successes. Many of his designs were for cycle-attachment auxiliary engines. Unfortunately for him he developed these at a time when such cyclemotors were not a viable financial proposition – there were already too many mass-produced lightweight motorcycles at cheap prices on the market between the wars." (from cyclemaster.wordpress.com)