2003 D (Gas bubble under the MM?)

[AstroRaider]

Is this an example of a gas bubble under the mint mark?

It is more pronounced than the photo shows.

http://www.lincolncentresource.net/forums/picture.php?albumid=245&pictureid=2953

Ignore the "doubling" on the date (it's just the lighting). Hey, maybe I can pass this one off as DDO on eBay. :tinysmile_hmm_t:

[illeagle]

That does appear to be a gas bubble. I fear it could look like this one day!
http://farm5.static.flickr.com/4016/4446165830_c30dc97c0e_o.jpg

[JeanK]

A good example of plating being pushed aside when the coin was struck.
Jean

[jcuve]

Yep, occluded gas bubble that presumably is brought on by impurities and heat generated from the strike. The '83 may have had another origin such as a small bit of damage exposing the zinc which, possibly with the presence of water, oxidized and sunk.