I have a small cast iron metal box labelled: "Admiralty Pattern A183 Board, Changeover V/Q Year 1944 Made by Sparton of Canada Ltd Contains 4 telephone type switches, two variable pots marked "Q" and "AVC" and four telephone type input jacks. Can anyone i.d.? Thanks Ralph VE3BBM --- This email has been checked for viruses by AVG. http://www.avg.com