before I saw the ngc grade, my guess was au55, as there is obvious wear on the portrait and in the obv fields. A nice looking example, the late date O mint tens form an affordable "set within a set".
Same here. I was the first to enter an AU guess and wanted to say 55 but the MS guesses before me scared me up to 58. It does appear to be a very nice example for 53, especially the reverse.