Not having graded too many of these coins, I'll give it a try .
1898-O Weaker strike , nice reverse, there's alot going on on Liberty's face though. Fields are pretty clean but with those facial marks I would say MS-63, with a shot at 64. Nice clash marks too.
1921-D Looks like an AU coin to me. If it is just a weak strike ,prevalent in 1921, I might stretch it to MS-60-61. But I see luster breaks in the pictures that lead me to an AU-55+ grade.
1923-S Good strike (or better pic !) Lots of hairline scratches on obv and rev, maybe not so visible without magnification. I would say MS-63 again maybe a shot at 64 if the hairlines are not so evident in hand. I sure wish these coins would tone better, and more evenly.
I know the O in ONE on the reverse (
Peace dollar) always has that fat oval look to it but that O looks split to me ? Could be a well placed hit but in that pic it looks doubled, tough to see if anything else is doubled...but that looks interesting.