I have a 1963 Lincoln Head Penny, on the front it has a symbol (possible eagle) to the right of Lincoln's face. Lincoln is facing the symbol. At the top of the symbol are the letters GS and at the bottom of the symbol right above the 3 (in the 1963 date) is the letters NS. Can someone tell me where I might find out something about this coin. I have searched the internet extensively and can not find any 1963 penny like it. I think it may be a misprint of some kind. Any help will be greatly appreciated.

Thank you,
Janet