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1979 21¢ Air Post - Aviation Pioneers: Octave Chanute (2 Varieties, Attached) Mint Pair
United States #C93-94 21¢ Air Post - Aviation Pioneers: Octave Chanute (2 Varieties, Attached) Mint Plate Block Varieties include: #C93 - Octave Chanute & Plane #C94 - Octave Chanute &...
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1976 31¢ Air Post - Plane, Flag, & Globes Mint Plate Block
United States #C90 31¢ Air Post - Plane, Flag, & Globes Mint Plate Block
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1976 25¢ Air Post - Plane & Globes Mint Plate Block
United States #C89 25¢ Air Post - Plane & Globes Mint Plate Block
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1974 26¢ Air Post - Mt. Rushmore Mint Plate Block
United States #C88 26¢ Air Post - Mt. Rushmore Mint Plate Block
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1974 18¢ Air Post - Statue of Liberty Mint Plate Block
United States #C87 11¢ Air Post - Statue of Liberty Mint Plate Block
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1973 11¢ Air Post - Electronics Mint Plate Block
United States #C86 11¢ Air Post - Electronics Mint Plate Block
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1972 11¢ Air Post - City of Refuge Mint Plate Block
United States #C84 11¢ Air Post - City of Refuge Mint Plate Block
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1971 21¢ Air Post - USA & Plane Mint Plate Block
United States #C81 21¢ Air Post - USA & Plane Mint Plate Block
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1971 17¢ Air Post - Liberty Head Mint Plate Block
United States #C80 17¢ Air Post - Liberty Head Mint Plate Block
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1973 13¢ Air Post - Winged Envelope Mint Plate Block
United States #C79 11¢ Air Post - Plane Silhouette Mint Plate Block
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1971 11¢ Air Post - Plane Silhouette Mint Plate Block
United States #C78 11¢ Air Post - Plane Silhouette Mint Plate Block
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1971 9¢ Air Post - Delta Winged Plane Mint Plate Block
United States #C77 9¢ Air Post - Delta Winged Plane Mint Plate Block
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