I can't remember now how many functions the hand controller had, 50 years ago I could operate them all by touch while peering at the B Scope. Anybody got a picture?
And 164798 -
This is a picture of an AI23 not AI23B. The roll axis rotated 90 deg
The dish orientation (2 half dishes side by side) was the same on AI23 and AI23B. The RF side didn't change, although the electronics behid wer somwhat different.
I do remember morning one of the AI23 Course - 'Before tomorrow go out and buy a set of coloured pencils to colour in all the relays by function set, and a bunch of hole reinforcements for the ring-binder holes'.