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Key terms: assay hallmarking silver item method nations swiss punching fineness articles convention precious metal watch goldsmiths jewelry platinum goods ccm assay office purity struck frame maker palladium switzerland craft recognized netherlands fire assay geneva suited laser marking indicated responsibility mark touchstone optional sterling suitable destructive inspection vienna convention date letter watch cases fluorescence other nations metal content common control art or jewelry official hallmarking international hallmarking Search external links cited by footnotes on Wikipedia page Hallmark: |
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