I think I have heard of such a caller but I don't think a 20 year old electronic calling machine is old.
Old to me is a Johnny Stewart 45 rpm record player called the Deluxe Electri-Call Game Caller.
Or maybe a Burnham Brothers mod 12 cartridge tape caller " 8 track. "
I'd love to get my hands on a JS or Weems 33 1/3 or 78 rpm instruction record.
Johnny Stewart was the first to come out with electronic callers in 1960 or 61, now those are old e-callers.