Hi Gang.
Thanks for all the replies and advice. For some reason I'm not getting an automatic email to say there is a reply, even though I did tick the instant notification setting.
Was asking for a friend who remembers one in a office where he worked in the late 60's. That's the best photo I could find of the unit which he said is the unit he recalled being there, but he never knew what it was.... until now
If anyone ever comes across one for sale please let me knowas I would get it for a surprise for him, doesn't have to be functional
Anymore info gratefully recieved
Age