Okay, so I am almost positive this is a ddo, but need help into identifying which one. I tried for about 1 1/2 hours for the pictures. Hopefully good enough.
It looks like it's this one.http://www.coppercoins.com/lincoln/diestate.php?date=1972&die_id=1972p1do006&die_state=lds Nice find!
I zoomed in and sharpened it a bit. I am still no expert but am learning to distinguish between DD and MD. I still really can't tell from this picture, but others might be able to.
I'm by no means an expert either but what helps me in comparing coins to known doubled dies is I'll open two windows with the OP's coin and the one I linked in separate windows, restore them down so I can compare them side by side. It helps you see the similiarities and differences between the two coins. Look at where there's extra thickness and in this case the U in trust look exactly alike.
Use the markers and the CONECA listings. http://www.varietyvista.com/Variety Master Listings/lincoln doubled dies 1970-1979.htm#_1972 Larry Nienaber