Thinking MS63. Excellent detail and luster (as far as I can tell), just a handful of scrapes and dings presumably from spending years bagged in a vault somewhere.
Lots of chatter in the fields but nice strike for a mid 80s O mint. I like it at 62 but it probably says 63 on the slab.
Sharp looking coin. Appears to have nice luster. I don't see any wear. Nice full strike (which aren't uncommon for 1885-O). But, it is pretty baggy. I think it's a solid MS63.
Sorry, I fail to see the “excellent” or “nice” luster other posters noticed. I’d grade it MS63 because there’s only the usual chatter and no severe hits, but not higher.
I'm never right, but I'll say 62. Couple of baggies that keeps it from being higher. I don't see any wear at all.