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https://www.costumejewelrycollectors.com/vintage-costume-jewelry-research/research-resources/vintage-costume-jewelry-tools-dating/
Dec 08, 2014 · In the 1950s, a new type of clasp using a hook and extender became popular for costume jewelry necklaces. The other types of clasps continued to be used, and are still used today. However, if you were dating a necklace that has an original hook-and-extender clasp, you could begin your research with the assumption that the piece was likely made ...Estimated Reading Time: 8 mins
https://www.drloriv.com/blog/how-to-date-vintage-costume-jewelry/
The back of the pin (see below) shows that the piece has a gold tone metal surface and the front of the pin is enameled to give the pin the colorful details. In addition to the materials and metals used in costume jewelry, the type of clasps, pinbacks, or security chains on a piece of costume jewelry can help you date a piece.
https://www.rubylane.com/blog/categories/jewelry/dating-vintage-jewelry-by-clasp-fastenings/
Dec 31, 2013 · The locking C-Clasp was patented in 1901. It was widely used for jewelry designs in 1910 and remains popular today. Early locking clasps often had a small rounded mechanism, and later ones had a locking piece that was separate and slipped over the holding piece of the clasp. Most modern jewelry makes use of the later style of locking C clasp.Reviews: 1
https://navettejewellery.org/2019/03/24/dating-necklaces-clasps-and-fasteners-part-i/
Mar 24, 2019 · The tongue clasp developed into push-in box clasp with a wedge-shaped spring-part fitting into the box (see clasp at he beginning of the post). The box clasps were handmade which allowed for quite beautiful ones to be used, often set with gemstones, enamel or inlay work, and sometimes with compartments for woven hair.Estimated Reading Time: 3 mins
https://www.myclassicjewelry.com/blog/vintage-jewelry-marks/
Aug 15, 2014 · Vintage costume jewelry usually doesn’t have purity marks, but will often have a maker’s mark (commonly called the signature), and can sometimes have a retailer mark and/or patent or inventory marks. Patent numbers are especially helpful when dating older vintage jewelry, and will be covered in a separate article in this series.
https://hobbylark.com/collecting/antique-jewelry3
Oct 24, 2019 · Clue 1: Fittings and Findings for Earrings. The invention of different earring findings will help date your jewelry. Jewelry findings are ready made pieces that jewelers use such as clasps, pin stems, hinges, etc. Fittings refer to the parts that can be custom-made for a piece.
https://www.thesprucecrafts.com/napier-costume-jewelry-148443
Nov 08, 2018 · Pamela Y. Wiggins. Napier costume jewelry from the 1920s and early 1930s is extremely hard to find and highly prized by both Napier enthusiasts and collectors of Art Deco jewelry. Like Ciner costume jewelry, it is often difficult to date Napier pieces simply by looking at the mark. This is especially true for the novice collector or dealer that ...
https://www.realorrepro.com/article/Dating-brooch-fasteners
Dating Brooch Fasteners - 1850 to 1910. One of the best ways to avoid reproductions and fakes is to know and understand how originals are made. Reproductions are rarely made the same as originals due to changes in materials, labor costs and modern production techniques. When looking at brooches, you can get a good idea of the age of the piece ...
https://worldeccentricitycharm.com/blogs/news/all-about-jewelry-clasps
Jul 22, 2016 · A Visual Dictionary of Jewelry Clasps CLASP: A small device, typically metal, to hold jewelry pieces securely closed when being worn. Vintage Clasp Samples Card BOX CLASPS Box Clasps aka Tab Insert Clasps aka Tongue and Groove Clasps Decorative box clasps can add so much to a necklace, especially if your hair is short or in an up-do.
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