1c-9c 1917-19 Issue (498-499,
504, 508-509). Mint N.H., all have choice centering and fresh color,
Extremely Fine, each with 1997-99 P.F. certificate
(Image) 
2c Deep Rose, Ty. Ia
(500). Mint N.H., perfectly centered with uncharacteristically wide and
even margins, post-office freshEXTREMELY FINE GEM. EASILY ONE OF THE FINEST MINT NEVER-HINGED EXAMPLES OF SCOTT 500 IN EXISTENCE.
The Type Ia Scott 500 was created during an experiment of the Bureau in creating a new type of transfer roll. A die was made from the old Type I transfer roll, having ten impressions on it. A new transfer roll was then made, using the new ten-impression master die. This new transfer roll was then used to create two new plates. Since this is essentially a "lossy" process, there are some noticeable differences between the plates created using this method and the old method of using one die impression to create the transfer roll.
With 1999 P.F. certificate (Image)
5c Rose, Error (505). Mint
N.H. double error in block of twelve, brilliant color, Very Fine-Extremely
Fine, the bottom error is a real Gem, with 1997 P.F. certificate (Image) 
3c Light Violet, Ty. I
(501). Mint N.H., Jumbo margins, brilliant color on bright paper,
Extremely Fine Gem, with 1997 P.F. certificate
(Image) 
3c Dark Violet, Ty. II
(502). Mint N.H., wide margins, intense shade, Extremely Fine, with
1997 P.F. certificate (Image) 
4c Brown (503). Mint N.H.,
perfectly centered with wide margins, bright shade, Extremely Fine Gem,
with 1992 and 2001 P.F. certificates (Image) 
6c Red Orange (506). Mint
N.H., incredibly radiant color, Extremely Fine Gem, a beautiful stamp, with
1997 P.F. certificate (Image) 
7c Black (507). Mint N.H.,
sharp impression on white paper, fresh and Extremely Fine, with 1998 P.F.
certificate (Image) 
10c Orange Yellow (510).
Mint N.H., choice centering with wide margins, brilliant color, Extremely
Fine, with 1997 P.F. certificate (Image) 
11c Light Green (511).
Mint N.H., Jumbo margins, rich color on bright paper, Extremely Fine, with
1998 P.F. certificate (Image) 
12c Claret Brown (512).
Mint N.H., perfectly centered with massive margins, gorgeous bright color,
Extremely Fine Gem, a huge stamp, with 2000 P.F. certificate (Image)