Hi everyone,  I have been using a Shure M91ED Cartridge for playing
Edison Diamond Discs.  I have two styli for playing records: a one-mil
elliptical for playing 33s & 45s, and a 3-mil for playing 78s, includ-
ing Edison Diamond Discs.  Both needles are made by Shure and are
marked "Hi Track".

I purchased the 3-mil through a mail order concern which advertised
in "Goldmine".  I don't remember the name of the company, though.
Another place to try is the "Record Finder", a publication out of
Virginia.  I don't have the address today, but I'll try to respond on
Monday night.  Victory Glass (515) 987-5765 or Jukebox Junction (515)
981-4019 may also be able to help.

Best wishes,  Mike Walter