Retro jewelry - 1937 styles inspired by the 1900s

It seems in 1937 some styles were inspired by the 1900s-1910s according to this ad. Included is a mention of jewelry in a "grape" motif in the "vintage of the 1900s". This is interesting to note when trying to date found jewelry. Keeping track of all the "revivals" of styles over the years can get really confusing!

(click pic to enlarge)