My thanks go to Yvan Vertongen
for these photographs of his Velorex. Yvan writes:
... I have 3 pictures for you of the 3-wheeler, I own since 1998. It's a VELOREX 16/350 from 1967.
It is a Czech 3-wheeler for invalids, build by the brothers Stransky from +/- 1950 till 1971.