Museum of the Game® & International Arcade Museum® Forums

I am working on an old "Visual Response Analyzer" that is missing the buzzers. Does anyone still have one of these that could give me some specs so I could find replacements? I'm not sure how they operate, other than assuming one of them should buzz when a wrong choice is made. There doesn't seem to be a schematic or any other info floating around. Any idea how old these are?

I'm also looking for some pics of the inside, to see if this one is wired properly or not. There is a big resistor mounted in the cabinet that I'm not sure is original.
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