If you're not after excessive quality, how about taking some screened leads directly from the heads and plugging the other end into the appropriate circuitry on a cassette recorder - i.e. trace where its heads connect? Press "play" on both, and see what comes out of the cassette machine.
I presume you're talking about quarter inch tape here (not knowig the machine). What speed/track format is it? If it is 3.75ips, 7.5, 15 or
30 in "stereo" or "two track" then just about any local radio station or recording studio should be able to play the tapes. They may even let you have half an hour with a nice old Studer or Revox to d-i-y if you ask them nicely enough.If the tape is slower than 3.75ips or is "half width stereo" or "four track" (the sort of thing where the tape was either flipped over or would play both ways) then these machines, being domestic, are a bit more rare. Probably best to find some hobbyist newsgroup in that case.
HTH.
Hwyl!
M.