Interesting, I've bought (from the Denver Mint) several hundred 2009-D Native American dollar business strike coins, and inspected the edge of each one. Their lettering is a bit weaker than on 2007-08 Presidential dollars, but each has been fully lettered.
All the other 2009-S Proof N.A. Dollars in the Sets I bought had nice strong edge lettering, at least equal to that of the 2007-09 Proof Presidential dollars in my Proof Sets.
All the other 2009-S Proof N.A. Dollars in the Sets I bought had nice strong edge lettering, at least equal to that of the 2007-09 Proof Presidential dollars in my Proof Sets.

















