The Ring or Disc of Solomon?

In the Mathers/Crowley edition of the Goetia of Solomon, you can find an odd diagram of the Ring of Solomon. The text tells us, "This is the Form of the Magic Ring, or rather Disc, of Solomon, the figure whereof is to be made in gold or silver."

Disc of Solomon? Where else can we read about this Disc of Solomon? Is it in the Testament of Solomon? Maybe the Talmud? Josephus? No, those all mention a finger ring.

What about all the manuscripts of the Goetia of Solomon? Unlike Mathers, we can search the internet and in a short period of time collect PDF versions of most of the manuscripts. A very good version of the GoS can be found at Joseph H. Peterson's site (click HERE). That's where I snagged this image:

This diagram shows a simple band with the word TETRAGRAMMATON inscribed on the inside and ANEPHENETON-MICHAEL written on the outside (the X is a correction to ANEPHEXETON). There is no mention of a "Disc of Solomon" in any manuscript of the Goetia of Solomon. The diagrams just looked like discs to Mathers and Crowley.

A ring like this would have been easy to acquire in the 16th and 17th centuries. All you would have to do is purchase a band like the ones used in common posie rings. For a little extra charge, the smith or jeweler would probably stamp or engrave the words for you. Or you could put your burin to good use.