this is 1963 Maico GS 175. same frame as mine.
That is one hell of a nice bike, but I think a case of a miss-informed owner. 1963 Gs Maico's were single down tube frames
Over the years I have purchased every bit of available proof listed on German Ebay.
I invite anyone to show me contrary.
In 1963 only Single down tube was commercially available, and the only
alloy Oval Barrels were still the 175 and the new 250.
Although the same 250 cylinder casting was used to produce the 360 capacity as well, but
only for the factory racers toyed with those 360 alloy ovals during 1963.