A die clash is when the two dies to strike a coin strike each other when a planchet is not in the chamber, directly transferring the design from...
Hmmm...I would say it is a match. http://coppercoins.com/lincoln/diestate.php?date=1944&die_id=1944d1om001&die_state=mds
It looks like mechanical doubling...note that repunched mintmark varieties are only present on coins dating 1989 and earlier.
Looks like you've got one of these: http://www.error-ref.com/phantom-mint-mark.html
Plating issues on this one.
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