Hallmark 287 AR typically refers to a specific hallmark used to identify silver items that are made in Argentina. The "287" denotes the registration number associated with a specific silversmith or manufacturer, while "AR" stands for Argentina. This hallmark indicates that the item meets the country's standards for silver quality, usually indicating the item is made of sterling silver (92.5% pure silver).
1758 AR is the trademark/hallmark of the factory in Italy that made that piece of jewelry. 1758 is the number of the factory and AR stands for Arezzo, the city in Italy.
The Hallmark, Gilbert Marks....london 1861- 1905
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Not quite sure what your asking but hallmark is a company that makes different cards (I'm sure you know) but a hallmark can also mean
ar
ar = on
It means that its 2500
Fake gems
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Date stamp of 1890
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