Antique Jewelry Hallmarks. The chance of finding them struck all together in one piece is non-existing. It certainly wasn't a priority of the jeweler to leave space for hallmarks, especially if it would be to the detriment of the style of the piece and particularly because it wasn't compulsory.
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EUROPEAN COUNTRIES SILVER AND GOLD HALLMARKS A silver or gold object that is to be sold commercially is, in most countries, stamped with one or more hallmarks indicating the purity of the metal and the mark of the manufacturer or silversmith Other marks can indicate the date of manufacture and additional information about the piece.
Most vintage and antique jewelry is stamped or etched with a mark representing the metal content and may also show the manufacturer of the jewelry as well. Describe the Cartouche, Frame or Shape - Examples: circle or triangle. Works primarily in gold and platinum.