In the first century BC, Marcus Vitruvius Pollio described Archimedes' discovery of hydrostatic weighing.
King Hiero II of Syracuse gave Archimedes the assignment to investigate the purity of a newly commissioned golden wreath, believing silver was added to the gold content.
Marks indicate it is Britannia gauge silver made by (or for) Paul de Lamerie (taken to or) in London and dated 1732 (it could have been made a year or two earlier than 1732).
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“Then I turn it over and look at the marks,” she says.
“I’m usually right.” In most European countries, a system is set up for hallmarking fine jewelry and watches, where an assay office tests each piece and puts their official stamp or hallmark on it to guarantee metal fineness, similar to the way diamonds are certified by the Gemological Institute of America (GIA).