Wow! Beautiful rainbow tones on the obverse and reverse, with nary a mark on either side of the coin. Looks like a 68! PCGS+ grade for premium quality at the top of end of the assigned grade. CAC approved for quality.
Barber half collectors know that the Micro O is the rarest widely-collected issue in the series. There are only a few dozen known in all grades and even low grade examples are really scarce and shouldn't be passed up.