Unusual 50p piece.

[Michael-Roo]

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?

[azda]

Large flan perhaps with excess material

[Chris Perkins]

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

[Michael-Roo]

13.3g

[Michael-Roo]

Another found in change many years ago….

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

Any ideas?

[Peckris]

Another found in change many years ago….

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

Any ideas?

2014-08-03 14.26.35.jpg

Post-minting graffiti (machine punched probably)

[Nordle11]

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

Probably machined like Chris says.

[Colin G.]

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

[VickySilver]

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

[Nordle11]

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.