Originally Posted by Calio

It's quite possibly a "bitsa". The thing is, it has 26 inch wheels & the fenders seem original & match the bike perfectly 🤷🏼‍♂️

So it seems very unlikely that it was built as anything other than a 3 speed originally. That said It's quite strange that the bike's hub is from 1960 but the shifter is from the 70's. Also I can't find an example of another Dawes 3 speed anywhere