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 Replies: 25 / Views: 6,199 |
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Valued Member
United States
109 Posts |
My friendly local dealer has invited me to make him an offer on this coin. I think the grade would be F Details, maybe even VF Details. I'm really concerned about the pitting and verdigris on the reverse, though. Can early American Cents get bronze disease, or is that just on ancient coins?   Edited by RubyOpal
07/03/2018 3:10 pm
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Pillar of the Community
United States
3479 Posts |
Most likely Verdigris that has eaten into the coin. It's nasty stuff and this looks like an active infestation. It would be nice to hear from some of our resident chemists explain the difference between bronze disease and verdigris.  |
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Pillar of the Community
United States
3323 Posts |
Quote:
...the difference between bronze disease and verdigris That's an interesting question. I've always heard bronze disease associated with older coins, especially those spending a long time near the sea coast or in salt water. So my guess would be that, in that case, the copper is attacked by chlorine / chlorides. I think Verdigris is more or less a slang term for any green residue on copper, since that is the name of the green dye once created in that fashion. Verdigris is caused by acetate reaction, including those associated with sulfur, carbon, chloride, bromide, etc. "Nummi rari mira sunt, si sumptus ferre potes." - Christophorus filius Scotiae
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Pillar of the Community
United States
3402 Posts |
Get that coin in a virgin olive oil bath for a few weeks.
KK
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Bedrock of the Community
United States
94367 Posts |
The verdigris is removable, but the pocks will obviously remain. Up to you to decide if this is an example you'll enjoy living with for possibly a long time.
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Rest in Peace
United States
4078 Posts |
Quote:
Get that coin in a virgin olive oil bath for a few weeks.
Sorry Ken, I disagree. From Coinfrog. Quote:
The verdigris is removable, but the pocks will obviously remain. Up to you to decide if this is an example you'll enjoy living with for possibly a long time.  This is a high grade coin. Acetone soak then Verdi Care. Edit.it was first called Verdi Chem. Edited by bpoc1
07/03/2018 4:46 pm
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Valued Member
 United States
109 Posts |
Quote:
Get that coin in a virgin olive oil bath for a few weeks. Will olive oil stop the corrosion? I thought the best treatment was a tiny bit of Verdi-Care. |
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Pillar of the Community
United States
3343 Posts |
"Make an offer" is a really bad sign... Judging from all the surface pitting, the coin has most likely been in contact with salt water, and may have already been cleaned a few times. I'd assume the worst. Bronze disease, probably deep into the coin. https://en.wikipedia.org/wiki/Bronze_diseaseThe treatment to stop it is a harsh cleaning regime, followed by chemical treatment to exclude any water and chelate the copper, followed by encapsulation. At that point you really don't have a collectable coin any more, just an interesting pitted artifact. You don't want this thing in contact with any other coins...or even in the same room IMO... You might want to figure out the Sheldon veriety. If the coin is rare it might be worth a couple hundred dollars even after cleaning and treatment. "Two minutes ago I would have sold my chances for a tired dime." Fred Astaire
Edited by thq
07/03/2018 4:44 pm
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Rest in Peace
United States
17900 Posts |
Although the obverse certainly isn't bad, that reverse active corrosion would scare me away.
This coin has the advantage of being an early copper issue. Most early copper has been in a hot market for many years now, even if detailed. But that coin needs serious help to kill that corrosion.
I've long believed there are no bargains in quality coins. Approaching my own purchases with that in mind has helped me pass on coins such as this with real problems just because they might seem cheap.
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Pillar of the Community
United States
8516 Posts |
I've been following these lately and that is a very nice coin. I doubt you could get it for 200 bucks but that's what I would throw at him.
Oregon coin geek.....*** GO BEAVS ! ! ! ***
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Valued Member
United States
109 Posts |
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You might want to figure out the Sheldon veriety. If the coin is rare it might be worth a couple hundred dollars even after cleaning and treatment. Sheldon 31, one of the most common varieties of 1794. |
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Pillar of the Community
 United States
3058 Posts |
Good looking coin. I would think it is worth $300-$350 retail.
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Pillar of the Community
United States
8715 Posts |
This coin currently exhibits active verdigris. It appears to be salvageable. A soak in 100% acetone from the hardware store, then a Verdi-Care treatment should help with the problem.
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Bedrock of the Community
United States
20753 Posts |
Quote:
This coin currently exhibits active verdigris. It appears to be salvageable. A soak in 100% acetone from the hardware store, then a Verdi-Care treatment should help with the problem. Best advise. Olive oil contains an acid. Not good for any coins. |
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Pillar of the Community
United States
3402 Posts |
Use what you want to use for the conservation of the coin. For over twenty years when I was collecting early american coppers I used olive oil to remove verdigris. Olive oil use was there before verdi-care. I don't see any reason to buy a product that does the same thing as something I can swipe from my wife's kitchen. Old time EAC collectors have been wiping down their coins for years with olive oil (don't for get to wipe excess off). Just monitor it closely. I've also used a tooth pick to gently cox out some deep down material. If you do nothing it will get worse over many years. If you want to use this verdi-care, then use it. Just do something. I don't make any money off of suggesting to use olive oil. Verdi-care?
KK
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Bedrock of the Community
United States
20753 Posts |
Using Olive Oil may work but you have to remember saying Olive Oil is like saying soap or cars or water. There are so many different kinds of those things and what is in one may well ruin things. Most Olive Oils contain acids and those too vary with the Oils. Just like a soap, water, cars they are all different. It is usually better to be safe than sorry.
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Replies: 25 / Views: 6,199 |
Posted 07/03/2018 3:14 pm
