This is the first issue 'A'. Thanks to Martin for providing issue 'A'
Notice how 'clean' this diagram looks, compared to the highly amended issue 'F' shown further down.
Issue 'J' is shown at the bottom of the page.

Below is issue 'F'
By this amendment, the diagram had got quite cluttered.

Shown below is issue 'J'.
This has been re-drawn, to show the 2 extra clock circuits, 61-70 and 71-80.
Also, better use has been made of the space available.