Anyone familiar with 2 cent pieces?

I have an 1867 II piece. The oldman left it to me. I went to PCGS/CU and found that there's an 1867 double die type. Can someone tell me what exactly I need to look for to distinguish it?. I'd appreciate it...

What is money, in reality, but dirty pieces of paper and metal upon which privilege is stamped?
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New collectors, please educate yourself before spending money on coins; there are people who believe that using numismatic knowledge to rip the naïve is what this hobby is all about.
We ARE watching you.
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.
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.
We ARE watching you.