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Antique and Vintage Jewelry Maker's Marks: A Collector’s Guide

    https://www.invaluable.com/blog/guide-to-jewelry-marks/
    Apr 06, 2020 · 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 piece. In 1961, the American government also mandated that jewelry manufacturers include a maker’s mark, which indicates the producer of a piece of jewelry.

Jewelry Maker’s Mark Antique Jewelry University

    https://www.langantiques.com/university/jewelry-makers-mark/
    Jewelry Maker’s Mark. Maker’s marks are the initials or name of the manufacturing firm or other representative symbol stamped into a gold , silver or platinum item. Also called ‘Trademarks,’ they often provide the only evidence that a certain piece of jewelry has indeed been manufactured by a certain jewelry …

How To Understand The Meaning Of Gold Hallmarks Jewelry ...

    https://www.jewelry-auctioned.com/learn/jewelry-how-tos/how-to-understand-the-meaning-of-gold-hallmarks
    Originally, the gold marks were impressed by a union of goldsmiths. These goldsmiths are the individuals who examine or check the purity of the gold product, and they are the people that mark the gold in their guild hall. By this process, the name “hallmark” was originated. Nowadays, these hallmarks are managed by assay offices.

JEWELRY MARKS - A - Global Gemology & Appraisals

    https://www.globalgemology.com/a.html
    Information: Antica Ditta Marchisio was founded in 1860, and is the first ever registered jeweler in Torino, Italy. They produced jewelry for high-end jewelry houses, such as Cartier. In 2000, the company was renamed to Mattioli Gioielli. Works primarily in gold and platinum.

How to Identify Gold Jewelry by Number Marks LEAFtv

    https://www.leaf.tv/articles/how-to-identify-gold-jewelry-by-number-marks/
    American jewelry is often marked by karat, stamped into the inside of a ring or bracelet, on the edge of earrings or the back of a charm. If the jewelry is marked 10k, that's the minimum mark used in the United States. Older gold may not be stamped but is usually 9k.

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