Looks really similar to an M2200, but not quite.
If you do a search for emerson needles, you can find a list of all models
(
http://www.turntableneedles.com/EMERSON_c_24171.html)
You could google-image search similar models and see if anything comes up.
Or, if you could find scans of department store catalogs or flyers from 87 or so (Kmart, sears, etc), you might find it there.