What does a seller mean when describing a coin this way?

The set includes acid date coins but is still a very nice set.
Thanks
Chris
Thanks
Chris
"The last thing we want to see is a smoking gun. A gun smokes after it's been fired…. If someone waits for a smoking gun, it's certain we will have waited too long."
0
Comments
The Lincoln cent store:
http://www.lincolncent.com
My numismatic art work:
http://www.cdaughtrey.com
USAF veteran, 1986-1996 :: support our troops - the American way.
Maybe it means they're from the 60's
My posts viewed
since 8/1/6
<< <i>How can you tell if a date has been treated with acid? >>
A discoloration/staining, usually lighter than the surrounding area, of the date.
They usually market- the semi keys and keys, for about 10%- 20% of the GD04 price.
peacockcoins