1921 No Mint Morgan Dollar For Evaluation

It looks like a pretty 'nice 21. They're tricky to grade because the dies used were much shallower than those used on earlier Morgans, and softer strikes mimic what would certainly be wear on earlier coins. Also, many 1921s left the mint without much luster. They were cranked out on an industrial scale for purely bureaucratic purposes. (Many more didn't leave the mint at all, at least not until decades later. Lots ended up as casino coins.)

I'd still venture to say that this coin is probably an AU specimen.

As you probably know 1921 is by far the most common date Morgan and is unlikely to sell for much more than its bullion value, even if it achieves a high-AU grade from a TPG. That doesn't mean that it shouldn't have a great deal of value to you, as it was your grandfather's coin.

There are many varieties (VAMs) of the 1921, and some do carry a small premium: http://www.vamworld.com/wiki/1921-P_VAMs

pristine2 said it well

pristine. looks mid AU i'd put it at AU55