A well organized site with photos and descriptions to help your research. I highly reccommend Mr. Doty's book which can be purchased from him on the website. It is a handy traveling guide to take with you on the hunt!
Extraordinary listing of costume jewelry makers and their marks. Many photos are provided of marks and probable dates are listed. There are also educational features exploring the many facets of costume jewelry. Hats off to Dotty and Pat!