I got just this half crown and saw the weight should be 14.1380g. I weighed it in at 13.8g. It doesn't look very worn, is this 3%ish variance too much or not suspect?
From the pictures presented here, it certainly does not look the be counterfeit. Not enough wear for a 3% weight loss.
If it IS genuine, then it must be an error coin.
Might be worth testing at a bullion dealer with an XRF instrument. If the alloy comes out at 50% silver, 50% copper, which is what I would expect, then an error coin would be confirmed.
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