Not sure about the doubling, but the "bar" behind the B in LIBERTY and all the die scratches around the T makes it look like the engraver tried to fix it.
It cannot be 1958D-1DO-001 because the mintmark is in a different location, two different dies are involved here. The 9 is affected by Machine Doubling as well as the 5, 8, and mintmark. The supposed 1958/7-D has been discredited- it is not an overdate/doubled die, just some scratches and gouges on the master die.
I gotta send this one in to ANACS. Nice coin, should grade 65 or 66, and I'll pay the extra for research. Even if I get 2225 I know the cost will be more than it's worth, but I'm not a dealer so money is not my major concern.
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