The stories a clasp can tell

The clasp on your jewelry can reveal the date your jewelry was produced. It is probably the single most truthful source for date, manufacture and any patent. The information below is sourced from the Morning Glory antiques site, go there to see an illustrated guide for each one of these clasps.

1850- trombone safety catch patented
1849- safety pin invented
1875- celluloid jewelry produced
1893- cultured pearls first developed in Japan
1894- screwback earring findings patented
1901- lever safety catch for brooches patented
1909- Bakelite patented (earliest was in black only)
1927- Cartier patented spring system for double clip brooch
1931- Coro patented mechanism for double clip brooches
1934- clipback earring finding patented

 

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