Vintage Engraved Bangle

Vintage Engraved Bangle I don't know what type of metal it is but I've had it over 20yrs and it's never rusted or oxidized. Just some scratches and worn spots, they just add to its character! Lightweight, not heavy at all, but strong! I found the exact same bracelet on Etsy and they have it listed as a "Antique late Victorian chased bangle bracelet with ornate floral design. 10k gold filled. Hallmarks unmarked." I don't know how to verify this information.