I know this is not like yours, but it's the closest I could find. Maybe it can point you in the right direction, and maybe it's just a distraction? This one has an "E" at the beginning of the design. Like I said, it may not be anything, but hope it helps.
From the 5th to the 10th century, this kind of monograms were very popular in all Europe, from the Byzantine Empire to the Anglo-Saxon kingdoms. In the upper class, everybody had his own engraved on his/her signet ring. (not mine, natürlich)
