3¢ 1857 stamp affixed over Confederate postmaster's provisional 3¢ entire from Tuscumbia, Alabama (Image)

E. $ 5,000-7,500

Perfectly struck "Old Stamps Not Recognized" handstamp on a Philadelphia carrier cover

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E. $ 7,500-10,000

"Old Stamps Not Recognized" cover to the North Atlantic Blockading Squadron in 1863

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E. $ 3,000-4,000

The only recorded "Southern Letter Unpaid" cover to Germany and one of five addressed to countrie (Image)

E. $ 50,000-75,000

A uniquely franked Adams Express Company through-the-lines cover to France, graphically demonstra (Image)

E. $ 50,000-75,000

Adams Express cover carried across the lines in August 1861 after suspension of the mails

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E. $ 1,500-2,000

Perfect strike of the "Mails Suspended" oval on a corner card cover to Richmond, Virginia, with a (Image)

E. $ 4,000-5,000

The only complete postally used set of Lincoln-Davis "5 Rounds" Prize Fight cartoon envelopes--wi (Image)

E. $ 20,000-30,000

A colorful "Angell" correspondence Patriotic cover to France with the 3¢ and 24¢ 1861 Issue

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E. $ 5,000-7,500

An outstanding "Angell" cover depicting General George B. McClellan and franked with the 24¢ 1861 (Image)

E. $ 5,000-7,500

An extraordinary and very rare hand-colored Magnus illustration of the Patterson Park General Hos (Image)

E. $ 4,000-5,000

Superb Leeds & Franklin patented window envelope with U.S. Sanitary Commission imprint

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E. $ 1,000-1,500

U.S. Sanitary Commission imprint on a Leeds & Franklin patented window envelope

3¢ Ro (Image)

E. $ 1,000-1,500

Rare example of the Brooklyn and Long Island Sanitary Fair Issue on cover with the Fair handstamp (Image)

E. $ 3,000-4,000

Illustrated Metropolitan Fair cover with 3¢ 1861 Issue

3¢ Rose (65), tied by circ (Image)

E. $ 400-500

Beautiful Metropolitan Fair illustrated cover with 3¢ 1861 stamp and fancy cancel

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E. $ 400-500

Citizens Volunteer Hospital illustrated cover with 3¢ 1861 Issue

3¢ Rose (65), ti (Image)

E. $ 1,000-1,500

Union Volunteer Refreshment Saloon and Hospital illustrated cover with 3¢ 1861 Issue

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E. $ 1,000-1,500

Cooper Shop Volunteer Refreshment Saloon Patriotic cover with 3¢ 1861 Issue

3¢ Rose ( (Image)

E. $ 750-1,000

Great Central Fair illustrated cover printed in red with 2¢ Black Jack

2¢ Black (73), (Image)

E. $ 750-1,000

2¢ Black Jack on an immaculate Great Central Fair illustrated cover

2¢ Black (73), (Image)

E. $ 500-750

One of only two full covers bearing a complete set of the Great Central Fair stamps

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E. $ 5,000-7,500

Great Central Fair 20¢ Green on a superb cover

Great Central Fair, Philadelphia, 20¢ (Image)

E. $ 2,000-3,000

Northern Ohio Sanitary Fair corner card cover addressed to Brazil

Northern Ohio Sanit (Image)

E. $ 750-1,000

Magnificent bicolored Confederate advertising cover mailed within Texas

"Dallas Tex. (Image)

E. $ 4,000-5,000