Black'N Roll
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They build a old fashioned replica Solex in China nowadays and because the Solex-brand is protected, they, a little too playfully call it the "Black'N Roll". And here you can see the different models inthe past in photo's (Dutch). I even found that a futuric looking electric model is being developed in France.
But above is the Dutch Berini M13, nicknamed "the Egg". In my youth I have a couple of times seen it mounted on the backwheel of a scooter. ( Is scooter still valid for a two wheel vehicle on which you move forward by standing on a platform between the two small wheels a making forward movement by stepping with one foot?)
