That is an amazing error coin... Slabbing will certainly enhance the value and protect the features. Looking at it magnified, I can see that it is indeed exposed copper and not a stain. Thanks for sharing the picture and the explanation. Cheers, RickO
Without the telltale copper trail, would it be obvious if a wire was rolled in vs a normal struckthru? Such as on a nickel, for example?
Good question. Probably not. Nor on a 90% silver coin either.
Numismatist. 50 year member ANA. Winner of four ANA Heath Literary Awards; three Wayte and Olga Raymond Literary Awards; Numismatist of the Year Award 2009, and Lifetime Achievement Award 2020. Winner numerous NLG Literary Awards.
Was watching an old documentary about the steel mill in Pueblo, CO the other night, and at one point they were rolling out steel billets, and it was pointed out how with each pass through the rolling mill the strip of steel got longer. That reminded me of this thread, and that quarter with the snake-shaped flaw.
This stretching effect helps explain why the copper welled up next to the steel bristle. The first time the bristle went through the rollers atop the planchet strip, (not necessarily the first pass), the bristle cut through the cladding layer and into the core. As the planchet strip passed back and forth between the rollers, the stretching effect pulled the harder copper-nickel cladding layer away from the cut slightly faster than it pulled the softer copper core simply because the copper-nickel is less malleable. Since nature and rolling mills abhor a vacuum, the copper core welled up into the void.
Note how it is stretched both ways. This is because the strips pass through the rollers in both directions to save handling of them.
TD
Numismatist. 50 year member ANA. Winner of four ANA Heath Literary Awards; three Wayte and Olga Raymond Literary Awards; Numismatist of the Year Award 2009, and Lifetime Achievement Award 2020. Winner numerous NLG Literary Awards.
never understood why strike throughs are considered an error. Simply trash on a coin when it was struck. No offense to the OP, nice looking strike through.
Gold has a world price entirely unaffected by accounting games between the Treasury and the Fed. - Jim Rickards
@derryb said:
never understood why strike throughs are considered an error. Simply trash on a coin when it was struck. No offense to the OP, nice looking strike through.
These are called struck in errors. A big difference. Extremely Rare.
No offense taken, to each his own, but honestly, this is damn rare, extremely eye appealing, and a PROOF to boot.
@ErrorsOnCoins said:
Insider2 wanted me to post this Proof Error. It is struck in scrap. It is not rolled in as there is no copper core bleed.
Great error!
Numismatist. 50 year member ANA. Winner of four ANA Heath Literary Awards; three Wayte and Olga Raymond Literary Awards; Numismatist of the Year Award 2009, and Lifetime Achievement Award 2020. Winner numerous NLG Literary Awards.
@JBK said:
What is the discoloration - rust? Maybe rust or "patina" from the wire that was spread outward on the surface as the whole mess was rolled out?
It is not rust. It is the copper core.
The wire or steel bristle was rolled into the metal as it was being rolled to the correct thickness before the blanks were punched out.
Sounds good but I don't believe it. I'll bet if I put that coin under a microscope, dampened the tip of a wood sliver and touched it to the edge of the copper discoloration it would disappear. Additionally, no one would see what I did after I covered my tracks! Then, I would know of sure it was a discoloration and not the core.
I agree. At first the obverse looks like copper bleed through the Cu-Ni layer, but I would bet it is rust left over from the piece of wire that was there that caused the damage left for a while.
Comments
Yes, there is an obvious difference in the look. I have a cent with a struck in staple. I'll look for the photo in the morning
The first quarter looks like a feather tickling GW's nose.
That is an amazing error coin... Slabbing will certainly enhance the value and protect the features. Looking at it magnified, I can see that it is indeed exposed copper and not a stain. Thanks for sharing the picture and the explanation. Cheers, RickO
Probably if some of the wire was beneath the coins surface as on one of the examples above.
Good question. Probably not. Nor on a 90% silver coin either.
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COOL
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Finest Toned Ike I've Ever Seen, been looking since 1986
That is HUGE
I hope you continue with your ' Let's make IKEs great again ' campaign
EOC. I’m grooving to your Jeff nick with the Lincoln memorial struck across his face. Now THAT is an error I can appreciate (but not afford)!
"Got a flaming heart, can't get my fill"
Was watching an old documentary about the steel mill in Pueblo, CO the other night, and at one point they were rolling out steel billets, and it was pointed out how with each pass through the rolling mill the strip of steel got longer. That reminded me of this thread, and that quarter with the snake-shaped flaw.
This stretching effect helps explain why the copper welled up next to the steel bristle. The first time the bristle went through the rollers atop the planchet strip, (not necessarily the first pass), the bristle cut through the cladding layer and into the core. As the planchet strip passed back and forth between the rollers, the stretching effect pulled the harder copper-nickel cladding layer away from the cut slightly faster than it pulled the softer copper core simply because the copper-nickel is less malleable. Since nature and rolling mills abhor a vacuum, the copper core welled up into the void.
Note how it is stretched both ways. This is because the strips pass through the rollers in both directions to save handling of them.
TD
Insider2 wanted me to post this Proof Error. It is struck in scrap. It is not rolled in as there is no copper core bleed.
never understood why strike throughs are considered an error. Simply trash on a coin when it was struck. No offense to the OP, nice looking strike through.
Gold has a world price entirely unaffected by accounting games between the Treasury and the Fed. - Jim Rickards
These are called struck in errors. A big difference. Extremely Rare.
No offense taken, to each his own, but honestly, this is damn rare, extremely eye appealing, and a PROOF to boot.
Enjoy what you collect, Chris
Great error!
I agree. At first the obverse looks like copper bleed through the Cu-Ni layer, but I would bet it is rust left over from the piece of wire that was there that caused the damage left for a while.
Wireside - noting the steel wire and the Raymond Burr character.
How about "Adlai's revenge"?
Great thread. Very informative and now the process is understandable. Thanks.
That proof error is cool!
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