2009 Polk Proof Dollar Error

Yes it is still in the sealed original holder with the other 3 dollars

Do you have a magnifying glass and can confirm if the streak is raised above design, like a foriegn object was stamped onto the coin, or perhaps a split in the plating, which would be more crevasse like.

Based on the edges though, I would say it was a bad mix of the composition metals, resulting in a poor-quality planchet. I'm pretty sure something like this could be worth more money, especially because its a proof, and that is quite the opposite of what a proof should be, being hand selected and all. I could be wrong though.

My advice. dont do anything hasty with it. Hold on to it, research more. and whatever you do, DO NOT remove it from the case. Thats about the only thing proving that it isn't PMD (post mint damage)

Hmmm, perhaps there was crud in the die that deformed the planchet. Very interesting.

Hopefully our resident error experts will wage in and give their opinion. I'm very interested to see the result.

yea, unless you have a digital microscope to snap pics, we will have to rely on your observation. Camera pics wont give enough detail and depth for analysis.

Looks like a piece of a wire brush that the mint uses to clean the dies. If it is then it could be a very nice struck through! I do not have experience in these but a few weeks ago there was a thread here with a cent coin that had a very similar look. The experts will be by shortly.

here's the thread
https://goccf.com/t/64166#64166

I just re-read the thread and it was stated that it is a brush typically used by the mint and not on the die as I stated.

ozmonster - some more research I found for you:

The following was found here:

http://www.coinworld.com/NewCollect...triking.aspx

Struck-through errors: Struck-through errors occur when foreign objects fall between die and planchet during striking.
Struck-through
(wire bristle)

Pieces of cloth, metal fragments, wire, slivers of reeding, grease, oil, dirt, wire bristles (from wire brushes used to clean dies, resembling staples), die covers and other objects may fall between the dies and the coin. The most collectible struck-through errors are those with the foreign object still embedded in the surface of the coin


Check this out too. I know Mike Diamond has been around this forum from time to time. Maybe you could send pics to the email listed on the page and have your proof coin pictures added to the list of errors pictured.(coins.guide@about.com)

http://coins.about.com/od/errorcoinsdievarieties/ig/2007-Proof-Dollar-Error-Coins/