The finishes you describe make it sound like it's just toning, but we can't tell you for sure without seeing the images that do show the difference.
The 5 Sacagawea dollars that don't have dates on the obverse should have Edge Lettering. They moved the Date, Mint mark, E PLURIBUS UNUM to the edge of the coin in 2009, and added stars.
Also look for edge lettering that is 'Typewriter' doubled, overlapping and sometimes in both Position A and Position B (upside down to each other.)
Some Sacagawea dollars had the edge lettering for the Presidential dollar added in error. These have dates on both the obverse and the edge.
ANA ID: 3203813 - CONECA ID: N-5637 Clean a coin that may be worth collecting? Please DON'T! When in doubt, leave it dirty!!






















