House of Rousseau, Bugby & Niles, Weiss have such pieces.
Finding one signed piece will help you find the unsigned pieces of the sets as they enter the vintage jewelry market.
In the United States, the National Gold and Silver Stamping Act of 1906 required jewelers to include an accurate purity mark, which indicates the materials used in a given work.
In 1961, the American government also mandated that jewelry manufacturers include a maker’s mark, which indicates the maker.
The key to investing in or collecting vintage jewelry is not always signature, but quality, condition, and how the design reflects the history of it's era.
Number 1 Red Buckle Brooch: This is a typical vintage Scottish agate buckle brooch, which dates from the antique Victorian period, circa 1880s.
To be considered an antique, a piece of jewelry must be 100 years or older, while a vintage piece must be 20 years or older.
Retro jewelry refers to pieces made during the 1940s and 1950s and are characterized by the use of large and colorful gemstones.Number 4 Cross pendant: This kitsch looking item is decorated with glass tiles and is properly known as micro mosaic jewellery, a distinct looking type of jewelry which has been made in Italy for hundreds of years.This Italian religious pendant is modern and dates from the year 2000 – it was made to commemorate Christs 2000th birthday and is dated on the back.Number 2 Glass diamante swag necklace: Although it looks vintage, this necklace is a lovely modern reproduction. The clasp is a modern ‘lobster’ clasp with typical post 1990s long extender chain.Also, the spacing between the stones is longer than on vintage necklace.Between 19, Eisenberg left some of their jewelry unsigned.