Anyone know if a silver coin can be saved after having been heat treated?

Greetings to all after being away all summer!
I have an opportunity to pick up a 1798 large eagle dollar that has XF details, maybe AU, but it has been heat treated to hide blemishes. PCGS slabbed it as genuine but ungradeable. Does anyone know if this can be reversed? This "silver" dollar is a chocolate brown like it was a 213 year old penny. Can NCS do anything? Would you guys pay $1900 for a $5k-7k coin? I'm on the fence and need some opinions. Would post pics but I haven't bought it yet. I will post pics of my new stuff as soon as I can take some.

 

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No, I don't think I'd spend that kind of money on a messed-with '98 dollar with XF details. I'd look for an attractive, problem-free VF in that range.
Lance.

 

There is no way to "undo" damage to a coin.

 

As stated by those above, it is always damaged after that..

That said, I would still like to see photos of it...

 

Sure you can crack it out and carry it as a pocket piece untill it wears down to FR2 then get it certified for a low ball set.

 

Here are pics of the dollar in question. I'm pretty sure I won't buy it because there's no up-side. It feels like a deal at $1900 but since it's ungradeable I think in 10 years it will still be just a $1900 coin. Also the die was filled and the stars to the right of the eagle's head are missing. Thanks for the opinions. You guys saved me from my desire for something nice that starts with 17XX.

 

Good choice to pass on this one.

 

I would say it depends. If you are buying for yourself, like the detail and cannot afford a better XF coin, then go ahead. I do not think most problem coins are great investments though.

Btw, I agree it cannot be reversed. Bad toning or AT can be dipped off, heat treatment changes the underlying metal color, and dip will not affect it. I have tried it before.

Chris

 

Seeing the photo, I am not sure it is caused by heat treatment ( or at least not alone). I have experimented with heated silver coins, and never had anything like that chocolate color. It looks much more like a sulfur treatment ( similar to Deller's darkener) than heating. Just my opinion.

Jim