50c Red Violet (517). Mint
N.H., brilliant color and proof-like impression on bright white paper,
Extremely Fine Gem, a superb stamp, with 1989 P.F. certificate (Image) 
$1.00 Violet Brown (518).
Mint N.H., intense color and remarkably detailed impression, Extremely Fine
(Image) 
$1.00 Deep Brown (518b).
Mint N.H., fresh color on brilliant paper, crisp proof-like impression,
choice centering with nicely balanced marginsEXTREMELY FINE GEM. A SUPERB MINT NEVER-HINGED EXAMPLE OF THE $1.00 1917 ISSUE IN THE DEEP BROWN SHADE. VERY RARE IN THIS SUPERIOR GRADE.
According to Johl, a small number of stamps were printed in this distinctive shade early in the issue of the 1917 $1.00 stamp. During the course of the six years that the stamp was issued, all other printings were made in the normal shade. Centered Mint Never-Hinged examples such as the stamp offered here are true condition rarities.
With 1983 and 1995 P.F. certificates (Image)