I recently inherited a coin collection, and was wondering what this particular piece is worth. It's marked as having a double date, and a double mint mark to the north. Thank you
Based on your pictures, it looks like it could possibly be http://coppercoins.com/lincoln/diestate.php?date=1972&die_id=1972s1do004&die_state=mds
I think it's both machine doubling and a doubled die. Look at the tail of the 2 in the date... that does not look like MD, in my opinion... there is even a notch visible. Above is 1972 S 1c WDDO-003 from Wexler's Die Varieties, and shows the same doubling on the 2, the only place where die doubling shows. @furryfrog02 also posted a link to a listing on Coppercoins for the same DDO.