Here's some pics of universal counter I picked up on Ebay about 6 years ago, it was shortly after I got my analogue scope; you don't see very many of these on the second-hand market; I originally lost the auction for this but the winning bidder returned it to the lady who sold it because he said it didn't work - so the lady offered it to me; when it arrived I thought the same until I discovered a CRT brightness knob on back of the unit which was turned right down, which might have been the issue; also I found it only works via the connectors on the back not the ones on the front. I later told the lady it was working fine and she was really pleased because it was her late husbands who used to work with submersible crafts.
