5c Blue, Die 1, Air Post Envelope, Essay on Bond (UC1P; Undersander EAM1Bc). Full letter size (Image)

E. $ 500-750

15c Red & Blue on Blue entire, Red Omitted, 30c Red, Blue & Brown on Blue entire, Red Omitted (UC (Image)

$ 270.00

1c Brown on Buff, 1873 Unwatermarked, Master Die Proof (UX1Pa). Showing the secret mark -- a (Image)

$ 1,500.00

1c Brown on Buff, 1873 Unwatermarked, Master Die Proof (UX1Pa). Showing the secret mark -- a (Image)

$ 1,500.00

1c Red Brown on Buff, 1873 Master Die Proof with "POD" Essay Watermark (UX1Pd var). Clear "D" (Image)

$ 1,000.00

1c Brown on Buff, 1873 Postal Card, Large "USPOD" in Monogram Watermark (UX1, USPCC S1). Unca (Image)

E. $ 400-500

(Unstated Value) Black on White Card, Morgan Envelope Co., Springfield Mass., 1875 Postal Card Es (Image)

$ 2,000.00

1c Black on Buff, 1875 Postal Card, Production Specimen (UX5PSa). Clear strike of blue "U.S. (Image)

$ 400.00

1c Black on Buff, 1891 Postal Card, Proofs Balance (UX10P, UX10PSb). The proof on thin soft w (Image)

$ 1,000.00

1c Black on Buff, Full-Face McKinley 1902 Postal Card, Die Proof (UX17P). "Die Proof Of McKin (Image)

$ 3,000.00

1c + 1c Black on Light Violet, Franklin W. Brooks, New York, Paid Reply Card Essay (UY1E-Fd). (Image)

$ 1,000.00

1c Black on White Wove, Franklin W. Brooks, New York, Liberty Paid Reply Card Essay (UY1E-KA). (Image)

$ 500.00

1c + 1c on Wove, Robert W. Mercer, Cincinnati O., Paid Reply Card Essay (UY1E-TA). Style with (Image)

$ 700.00

1c +1c Blue on Grayish White, 1893 Paid Reply Postal Card, Production Specimens (UY2PSa). Fir (Image)

$ 1,000.00

Postal Stationery Unused Collection. To 2001 in four binders, entires start in 1887 and inclu

E. $ 750-1,000