NGC has certified 186 of these in all conditions, and 5 in higher grades (all MS-63) than this coin.  There are 35 coins including this one that NGC has graded MS-62.  I have not seen all of them, but I have seen a few, and the face is not as well struck as on this coin.  It's a tiny .63 gram of silver with a lot of expressiveness in the tiny portrait.