[2] The reason to offer the same model P203 with the downsized 200 cc engine was to meet the legal permit of license free drivers and the vehicles exception from tax that time.
[3][4] Competitors also offered 200 cc engine version of their vehicles.
Unique under the competitors the four variants of "Eillieferwagen" (express delivery vehicle) had the rear under floor or flatbed placed two stroke engine, 200 cc as single cylinder or a 500 cc two cylinder boxer-engine.
[5] Vehicle variations with the 500 cc allowed for a payload of 0,75 metric tons, and variations with the 200 cc engine 0,5 metric tons.
[2] After World War II, only competitors continued their three-wheeler production, while the four-wheeler successors "Heck 504" and "Heck 604" where in production from later 1946 till 1949 and early 1950 and superseded by the Gutbrod Atlas.