Morning Glory Antiques has an enviable amount of antique jewelry catalogs. Not only that, the owner Jane has taken the time to copy many of their pages and post them on her website for reference alongside her remarkable collection of rare heirlooms. I used her website as a starting point when I was just learning about antique jewelry many years ago and was excited to see her post about antique bangles. Some of these gold filled bangles are commonly misidentified, and so her thorough research is very helpful. Here are a couple images from some of the main design periods I pulled from her article.
Victorian

RODDIN 1888 Catalogue
Fine solid gold bracelets, polished stiffened wire, polished square stiffened wire, Roman flower bracelets.
Art Deco

Filigree silver tone filigree hinged bangle with deep aqua center rhinestone and black and yellow enameling, circa 1925
Retro

“Betsy Ross” Victorian Revival gold filled hinged etched bangle with stamped scrolls and black enameling, circa 1935