It’s a bit frame-like and a lot like a circle medallion image. Believe it or not, it was actually part of the design on the cover of a vintage timepiece from a book all about them by James W. Benson from 1875.
A vintage book talking about a vintage watch provides us with this circle upon circle upon circle medallion image. It’s a bit rustic and isn’t totally edited to today’s standards. But, I think you could easily duplicate the design, fix up this one a bit more or leave it in its current form.
Hopefully, you’ll find a great new use for it regardless.
This image is copyright free and in the public domain anywhere that extends copyrights 70 years after death or at least 120 years after publication when the original illustrator is unknown.