2011 5 Cents-Is This A Plating Problem?

Something has come between the die and the planchet. Normally when that happens, it is grease, but I don't think that is the case here. Maybe some grit has stuck the the planchet before striking, or (much less likely) there is rust on the die face. I have a couple of coins struck from rusty coins, but they are over 100 years old. The way Mints are these days, rusty dies would not be used.

It looks like something(s) have been impressed into the coin, and by the looks of it, happened at the time of srtiking. If that is the case, technically it is a Mint error. Value? Not that much.

It could be a plating problem, but I don't think so, from what I can see here.

I think its a plating error as a result of debris being on the planchet prior to the plating.

Thanks for the comments. I'm assuming that the composition is the same as 2010:

.945 steel .035 copper .02 nickel

Don't know how I missed this thread, I love this kind of thing.

In my opinion;
That coin has missed a cleaning step or has been inadequately cleaned between plating processes. As a result normal air and humidity remains between the layers and the coin will eventually peel. I bet this coin has it's normal copper plate underneath the top nickel layer and that it is NOT missing a plating step.

I have seen this exact effect dozens of times and kicked my own butt because it was avoidable. Now I clean twice :D

Edit for typos, never drink and post boys and girls.