It is most likely a re-engraving of the design (mint employees "touched up" the image on the die for whatever reason), or it is machine doubling. There are very few doubled dies that I know about which involve doubling of the profile. Keep up the hunt!
i thought MD usually shows a shelf like image? i looked at this with my hand held 60x-100x and there is no shelf like image. is the different classes of MD like there are doubled dies?
This may help but there a 4 page list for 1944-P@ Copper coins/link below but not many are worth that much unless there MS-66++/RD Gem toned etc. http://www.coppercoins.com/lincoln/dietype.php?date=1944&die_mint=p&die_type=do&page=0
It is most likely re-engraving then, if you are not seeing the doubling as flat and shelf-like. Quite common for the 1940s. Keep up the hunt!
