1921, 5c-40c Air Post
Officials, "Panama Canal" 17mm Long (CO8-CO12). Used as almost always,
fresh and Very Fine (Image)
1941, 30c Rose Lake, Air Post
Official, "Panama Canal" 17mm long (CO11). Mint N.H., deep rich color,
Very Fine and choice, extremely scarce in unused condition, none was
offered in the Plass sale, unpriced in Scott
(Image)
1947, 6c Yellow Brown, Air
Post Official, "Panama Canal" 19-20mm long, Inverted Ovpt. (CO14a).
Roller precancel, Mint N.H. (small natural gum skip), rich color, wide
marginsVERY FINE AND CHOICE A RARE EXAMPLE OF THE 6-CENT AIR POST OFFICIAL STAMP WITH INVERTED OVERPRINT.
Only one pane of 50 reached the public. Of these, only 36 are perforated on all four sides. It is only known with the roller precancel.
With 1983 P.F. certificate. (Image)