VERY FINE. AN EXCEEDINGLY RARE EXAMPLE OF THE 1918 24-CENT AIR POST GROUNDED PLANE VARIETY ON COVER.
According to a 1956 article in Aero Philatelist Annals, one sheet of the Grounded Plane variety was part of the stock of the Nassau Stamp Company. Apparently, the company had difficulty selling the variety and decided to use some on the first transcontinental night flight. Only a few are known used on these covers.
EXTREMELY FINE GEM. A STUNNING MINT NEVER-HINGED EXAMPLE OF THE $1.30 GRAF ZEPPELIN ISSUE.
With 2010 P.S.E. certificate (Superb 98; SMQ $3,100.00)
EXTREMELY FINE GEM. A SUPERB MINT NEVER-HINGED EXAMPLE OF THE $2.60 GRAF ZEPPELIN WHICH HAS BEEN GRADED SUPERB 98 BY P.S.E. -- ONLY TWO GRADE HIGHER.
With 2010 P.S.E. certificate (Superb 98; SMQ $5,250.00). Only two grade higher to date (one at 100 and one at 100J).