Dittmar HD 156 ![]() The three-seat HD 156 modification of the HD 153 featured revised front and side cabin glazing with additional side windows.
Small numbers of the type were completed by the end of 1960 and on 1 January 1961 four HD 153 and four HD 156 Motor–Möwen appeared in the West German civil aircraft register. In 1965 four HD 153 and five HD 156 Motor-Möwen were registered in West Germany. By 2007, no examples were known to be active.
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