Being a jewellery geek and nerd that likes the unusual and different mixed with history has its advantages. Also this type of clasp is still sold today and may be used by some jewellery makers. A circular clasp that opens with a small lever was used from the thirties to the late eighties and into the nineties.Pin stems, screw-back earrings findings, safety and plain catches. Dual ring guards, child's ring chains, earrings guards, safety chains, cord bracelet guard chains, Benj. Exclusively Wholesale, 1950 shown here was patented in about 1894, though these earrings originally had a different style back for pierced ears.The ends of the original ear wires can be seen at the top of each earring.The best jewelry detectives know that leftover components from earlier periods were sometimes used by frugal jewelry manufacturers, however, and clasps might have been replaced over time as well.Whether updating a collection, searching for information about a family heirloom, or assisting a colleague or customer, dating a piece of vintage costume jewelry can present a challenge.So you will need to date the whole necklace or bracelet generally.Around about the late eighties to early nineties, the lobster style or claw clasp came into use.
The replaced links are not usually soldered like the rest of the piece.The patented designs from a given year or a given decade show the popularity of styles, materials and themes, and indicate the types of findings and the methods of construction being used for the time period.Prior to the early 1950s, typical necklace clasp styles used by Coro and Trifari were spring ring, push (also known as box), or fold-over.I love jewelry, but appraising and selling are two entirely different businesses, and I choose selling and research as my business.Instead, articles are added on a regular basis to JEWEL CHAT on line Magazine, a wonderful reference for information on many makers and styles of vintage jewelry.