[ATTACH] It's MS-67, and an addition to my registry set: [ATTACH]
Doesn't have to do with thick or thin, but more with the curvature of the two.
All large dates. You can use this for reference in the future: http://www.lincolncentresource.com/smalldates/1982.html
Large Date
The mark on the chin is there, but pretty unnoticable in hand. As for the other marks, you can't even tell they are on the coin. My camera tends...
The "chop mark" looks like a chinese character to me. Could indicate counterfeit.
Separate names with a comma.