Hello, I am looking for sources on where to obtain for the magician's "M" or wishbone ring (not a trick ring but the one you wear). I can't seam to locate one anywhere on line. Furthermore does anyone know about the history and origins of these rings. Any info would be greatly appreciated.

I went on Google and saw many sites for "Wishbone" Rings, but I am not sure if this is what you are looking for. These are diamond rings.
Are you thinking of the ring that has open links and as you turn it, it appears to change size?
Tannens has it, but I am not sure if they call it that.

Nucinud, Thanks for trying to help. I am looking for an ungaffed, magicians "M" ring that are often worn my magicians. I don't have any photos of one but if you look at the Annotaed Erdnase pp. 244 and 245 you'll see what I mean. That's not even a very good example, I'll try to post a picture of what I mean. Thanks very much for your help. - Mark

Look here. For some further information on the ring, see this thread.

Here is a source for the "M" ring.

Just in time for Christmas, a newly released "catalogue" of magic themed jewelry brought to you by the trio of Harriet Jacobson, Gay Blackstone & Robbie Wilmarth, founders of BJW magic jewelry. Contact StormyMagi@aol.com for an electronic catalog.

Thanks guys for the above resources. I appreciate it- Mark