Thanks for posting @MiguelL , I realise it was for the benefit of the Ducati ad, but looking at the rest of the page, I can get to appreciate the appeal of the (not yet standardised) rear "swinging arm" looking through the eyes of the average biker back then.
Maybe, cost of living in th 1960's https://www.retrowow.co.uk/social_history/60s/how_much_did_things_cost.html
We rented our Telly(black and white) late 60's, it had a slot meter on the back, it took sixpence/shillings, more than once we'd be watching Star trek and ping it'd go of, so one day dad had a good "look" at that little box on the back and found if he re-arranged the wires the meter never ran out, the man who came to collect every month was quite perplexed