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The demand for this kind of information is absolutely too overwhelming for one dealer to fill.
I love jewelry, but appraising and selling are two entirely different businesses, and I choose selling and research as my business.
Whether you plan to keep the jewelry as a family heirloom or would like to resell it, a knowledge of vintage jewelry marks will help you to identify and date it properly.
I often get requests from people asking for help with vintage jewelry they’ve acquired.
Some general styles are T bar pins, C clasps, C clasps with extended pins, Locking C clasps, Trombone clasps.
The T Bar clasp is one of the earliest styles of clasps for brooches and pins. The pin extended slightly over the edge and had no locking or holding mechanism.
After Trifari won a court case in 1955 for copyright infringement, patenting these types of designs was widely discontinued and replaced by the less-expensive process of design copyrighting.
It is obvious that Trifari and Coro patent information can be used to date pieces of their manufacture.
Many tools and techniques are familiar to the experienced collector, including dating by textured versus smooth back casting, extended pin stems and simple “C” closures, the presence of a copyright symbol, the use of aurora borealis rhinestones, to name but a few.The style of clasps will often give us a relatively good idea of how old a piece is.There are several types of clasps that were used on brooches from very early days right up to contemporary pieces.However, this information can also be used to assist with dating jewelry made by other companies.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.