One of my favourite layouts. Note that with 1/52, it was more economical on space! The baseboard was on top of what was our model railway layout - which never got used again - and the whole lot on a 1/4 size billiard table in what became known as the Steptoe room....
Probably about 1964 or could be a lot earlier.
The newer Scalextric cars are in many respects, better value than the 1/43 scale models. Check out the detail on this. Never been out of the box except for the photo... (Quite a few more in the collection.)