1933, 50c Chicago Zeppelin on cover with Planty #1, scarce Zeppelin illustrated Grimsland cachet in blue, #C18, single tied by Akron, Ohio machine cancel on flown cover to the Century of Progress Post Office in Chicago, IL., purple flight cachet h.s., Chicago receiver on back, pristine and very fine, rare cachet (Image)

$100

1933, 50c CHICAGO ZEPPELIN TOP PLATE #21178 BLOCK OF SIX NH, #C18, fresh, very slight natural gum bends, very fine, cat. $675.00 (Image)

$300

1934, 6c ORANGE GLOBE AIR POST FOUR PLATE BLOCKS, EACH FROM DIFF. POSITIONS, NH, #C19, fresh and very fine, cat. $80.00 (Image)

$40

1941-44 TRANSPORT AIR POST TOP LEFT PLATE BLOCK SET NH, #C25-C31, very fine, cat. $81.20 (Image)

$40

1952, 60c HAWAII AIR POST MATCHED PLATE #24592 BLOCK SET OF FOUR NH, #C46, very fine, cat. $76.00 (Image)

$35