You guys are cruel, thats a very pretty little motorized bicycle,
and seemingly in excellent condition.
probably be still running along when the petrol has all run out,
and supplies are limited to sunflower oil...
Google is your friend here, an evenings googling will likely show many matches,
its 'just' a matter of pinning down a year. Certainly ran for a number of years,
with not a lot of changes, judging by a quick viewing.
That engine number tag 'fallen off' is of concern. ?
You have receipts and paperwork for it ?
