I was thinking this was DDO-001. After lining up the pictures, maybe just MD? Does look like the "C" in "Cent" has die scratches that match Copper coins die markers.
It is somewhat agreed that the class II doubling on many 1937 Lincolns is MDD. So, quite honestly you have to actually see the die markers to attribute these, since the doubling itself should pretty much be the same on a number of different listings. It's a year that, in my opinion, needs reworked.
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