Quote:
Originally Posted by SPCh
Clues on the outside are the terminal style (black knurled screws or red and black socketed-screws), and whether there are "P.F." sockets at the top corners.
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It has red and black socketed terminals and PF sockets. The whole thing feels very 'late', and even 1956 seems early, though it may have had some internal components replaced of course. The metal instructions panel on the back also has a 60s feel, though I suppose 1956 is possible. I'd be astonished if it dated from the 40s.
http://www.psherwin.demon.co.uk/avo7back.png
Paul