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Michael-Roo

Unusual 50p piece.

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I found this in my loose change around 25 years ago and its been sitting in my oddments box ever since.

Strangely formed and curved smooth edge. Post mint tampering?

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post-8388-0-12195400-1407065896_thumb.jp

post-8388-0-58079600-1407065979_thumb.jp

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Large flan perhaps with excess material

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Or someone has machined it, for fun? The weight would be a clue.

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Another found in change many years ago….

Normal in all respects, apart from the tiny 'R4' deeply punched into the obverse field.

Any ideas?

post-8388-0-59024200-1407072860_thumb.jp

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Another found in change many years ago….

Normal in all respects, apart from the tiny 'R4' deeply punched into the obverse field.

Any ideas?

attachicon.gif2014-08-03 14.26.35.jpg

Post-minting graffiti (machine punched probably)

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Normal (old) 50p weight is 13.5 so no excess metal/large flan etc.

Probably machined like Chris says.

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I have seen older copper coins with similar features when placed in a roller or excessively rolled. This would explain the smoother corners and the fact that excess material is started to lap predominantly over the corners

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Isn't that process termed "knurling"? Not sure but that is PMD (post mint damage).

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Some people call it different things I think. I've heard this being called "spooning" as well and there's a similar effect you get from putting a coin in the tumble dryer which I've heard being called "tumbling", unsurprisingly.

The latter really wears all the detail from a coin though so it's blatantly obvious.

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