LDS/VLDS obverse die, EMDS reverse die, typical strike for the date and mint.
I agree, problem-free AU-58.
You
may have
1929-S RPM-001, Stage A. The lower curl of the secondary "S" is not always visible on this critter, so focus inside the upper loop of the primary "S" for the SW part of the top curl of the secondary "S." If it
isn't RPM-001, you
very likely have the earlier die marriage of the first obverse die that became Stage A of RPM-001. The key markers are clearly visible on your obverse, so the only real question is whether it is mated with the previous reverse or the RPM-001 reverse.
Fascinating coin!