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In the United Kingdom in 1973, an act of Parliament was passed to better regulate gold hallmarks. The markings govern all of the UK's official assay offices. The markings exist to determine gold content/purity.

The number 417 indicates the gold is 10 carat. Depending on how the letter 'M' is pressed, it would most likely represent the date. In this instance M could be circa 2011. Depending on how the 'm' is pressed, it could go back as far as 1784.

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12y ago

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