As a kid growing up in Switzerland in the 50s and 60s, they were just brilliant. As soon as we were aged 14, we all had one. We used to tamper with the speed limitation devices and put all sorts of extra stuff in the tank to make them go faster (castor oil, if I remember rightly?) - and of course, no helmets in those days. Must say I have really fond memories of my VeloSolex

(and a few scars too).