Alloy problem?

[SirDave]

Has anyone seen this type of issue before? looks like the alloy isn't quite right? I have heard about this but had't seen it. Can't see any sign of pmd.

The discolouration seems similar to some types of copper toning.

Obverse

Reverse

Side

[Unicorn]

Not sure, but it looks like it has come into contact with some high heat in that area.

[trout]

oxytorchitis :ok:

[Nevol]

oxytorchitis :ok:

:i_agree:

[purplepennyhunter]

oxytorchitis :ok:

:i_agree:

Love that name, I agree with all the above statements.

[Goldseeker]

No argument from me either.   100% agree with contact with a high heat source.

[Fulvio]

I have heard about this but had't seen it.

This is what you get when the missus forgets to check the pockets before incinerating your corpse.

[SirDave]

I was wondering about heat. Sounds like it's likely. Coin looks remarkably good though and the discolouration only shows up in certain light. I might try an experiment with some coins and a flame.

[autocoupler]

If the cause is from oxytorchitis I reckon it wasn't deliberate. Who would intentionally attack a coin in that way and just singe the edge? But I have seen a few instances where the odd person has been set alight accidently on purpose by the gas axe, and maybe there was a coin in their pocket :biggrin:

[robbiegal]

? cigarette lighter?

[trout]

I normally carry my marking chalk in my pocket when I have to use an oxy torch or doing some welding  .
I have often grabbed a couple of coins out of my pocket and dumped them on the workbench when I go for the chalk.
it is not unforeseeable that a coin may cop a glancing blow from the torch or get a white hot lump of metal dumped on it with this scenario.

I was thinking of this when I came up with the " oxytorchitis " description :ok: