I just picked this up off ebay, it has the hole in ear and the date position looks correct for the N15/21 obverse. The back does not appear to have any point down from the T in CENT and UNITE is uncracked. My issue is I can not see any of the obverse die cracks, and I hate to make an attribution based on everything I can't see, as opposed to seeing something specific to a die.
I guess my questions is, can anyone confirm that no other small date 1846 has a hole in the ear, and what are your opionions? If not, I am fairly certain the reverse does not match the N15 which would make it an N21...
Two more close ups of (N)T and UNITED