Error of Post Mint Damage - What's up with this quarter

Windycity

Odd quarter here - appears to have mint luster but I have no idea what's going on with the surfaces... assume it must be post mint damage but welcome opinions. Acid treated?

DenverDave

Reminds me of 1964 Haight-Ashbury...!

TommyType

Looks like serious heat damage, with the surfaces actually melted and flowing. Like it was placed in an industrial furnace for some period of time, and then removed.

BustHalfBrian

Acid

jmcu12

PMDsquared

goodmoney4badmoney

It's PMD from a strong acid.

lostincoins

If acid, why did it not affect the center of the coin and why does the metal flow towards the center from 2 primary directions. To me it looks like heat got at it like it got stuck in an industrial dryer.

Edit to add: Could you please weigh the quarter for us?

3keepSECRETif2rDEAD

<< <i>It's PMD from a strong acid. >>



Wavy Gravy...the brown Acid

Erik

Treashunt

<< <i>Acid >>



agreed

jmcu12

That poor thing looks like it barely survived the 70's...

TennesseeDave

Possibly held against a wire wheel grinder for a while.

johnny9434

thats gotta be pmd some how. maybe like it was said a wire wheel or something. jmo

ms70

Where did you get it?

silverpop

PMD

19Lyds

<< <i>Odd quarter here - appears to have mint luster but I have no idea what's going on with the surfaces... assume it must be post mint damage but welcome opinions. Acid treated?


>>

That reminds me of this one:







To which a lot of folks said "acid" which really makes no sense since an acid bath would affect the entire surface evenly. Would it not?

I was told that this coin was the result of "acid".



Which makes sense to me since it's a thin and reduced equally. Acid attacks the metal and, IMO, might only leave a pattern such as what is on the OP's coin if the alloy was denser at the high points than the low points. It most certainly would not leave a pattern suggesting a "metal flow" much less a metal flow in DIFFERENT directions.

Consider this 1970-D Washington:





Similar erosion patters (different directions due to metal flow) yet on a much smaller scale and since it is not as dramatic as the OP's coin, it's readily accepted as "die erosion".

Now I have no idea what happened to the OP's quarter but I would not automatically assume "acid" simply because the patterns are too similar to die erosion and the petterns do not suggest the result of a liquid leaving the surface of the coin.

I would be curious as to what really happened.

ricko

Interesting effect..... I would lean towards heat rather than acid though...one of those small butane torches could do this..Cheers, RickO

ms70

I could picture some strong acid dropped in the middle of the coin which would be the high point. The melting metal then flowing downward to the lower areas & pooling but not
enough metal movement to get to the more vast areas of the fields. In the fields the acid ate the surface but did not move metal.

No smart remarks about dropping acid.

19Lyds

<< <i>Interesting effect..... I would lean towards heat rather than acid though...one of those small butane torches could do this..Cheers, RickO >>

But..............wouldn't this impart toning or at the minimum blackened areas? Not to mention that the piece would have to be held in place by something which didn't melt and which would have left some type of marks indicating where the coin was held.

IF the implication is with "melting" of the meta, it simply would not work since the CnClad alloy has a melting point of 2140 degrees F while pure copper (the core of the coin) has a melting point of 1984 degrees F.

In other words, before the surface of the coin were affected, the core would have melted out.

Would it not?

WoodenJefferson

Classic acid etched coin...it probably looked like a 'Fizzie' in hydrochloric acid.

AMRC

For those that said PMD. While I am sure you are correct, I just wonder what you based it on.

This does not look like acid. Center is flatter than the edges. I am going to say someone took a fan tipped torch to it and the gas pushed the melted metal away from the center band of the flame.

Anyway, that's my two cents.