1910, 1¢ Blue on Glazed Paper, Typographed Proof. Typographed proof of completed soft steel engraved 23½ x 29mm die essay of proposed McKinley stamp as produced by Tiffany & Co under P. O. D. order Q258 of April 7, 1910, overall 76½ x 89mm die size on 173 x x151mm glazed white paper, pencil and manuscript "Made by Tiffany & Co., of New York." at bottom right, P.O. Department red "13" handstamp along with purple "Stamp Division, P.O. Dept, Apr 25, 1910" double-circle datestamp at top right. Scott No. UX22P.
USPCC No. S30E-Ja; $3,000. USPCC $3,000
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USPCC $3,000

1910, 1¢ Blue on Bluish, Horizontal Paste Up. Mint vertical pair of cards with 49mm tan tape between, Very Fine and rare unsevered paste-up pair. Scott No. UX22 var.
USPCC No. S30PUh; $700+. USPCC $700+
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USPCC $700+

1910, 1¢ Blue on Bluish, Rotary Press, Horizontal Paste Up. Mint card, 49mm tan tape at center, Very Fine. Scott No. UX22 var.
USPCC No. S30PUh; $350. USPCC $350
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USPCC $350

1910, 1¢ Blue on Bluish, Rotary Press, Horizontal Paste Up. Mint card, brown tape at top, Very Fine, ex-W.I. Mitchell, G.C.Slawson. Scott No. UX22 var.
USPCC No. S30PUh; $350. USPCC $350
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USPCC $350

1910, 1¢ Blue on Bluish, Flat Plate, Horizontal Double Impression. Mint card, two impressions with one regular and one intense wide horizontal registration, Extremely Fine and choice. USPCC No. S30bh.
Scott No. UX22a; $950. Scott $950
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Scott $950

1910, 1¢ Blue on Bluish, Rotary Press, Horizontal Double Impression. Mint card, two impressions with wide horizontal registration, Extremely Fine and choice. USPCC No. S30bh.
Scott No. UX22a; $950. Scott $950
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Scott $950

1910, 1¢ Blue on Bluish, Flat Plate, Vertical Double Impression. Mint card, two impressions with vertical registration; light corner crease and slight overall toning, Extremely Fine and choice, ex-Floyd. USPCC No. S30bv.
Scott No. UX22a; $950.

THE FINER OF ONLY TWO RECORDED EXAMPLES OF THE 1910 1¢ BLUE UNSHADED BACKGROUND POSTAL CARD DOUBLE IMPRESSION VERTICAL ERROR. Scott $950
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Scott $950

1910, 1¢ Blue on Bluish, Rotary Press, Triple Impression. Mint card, two impressions almost coincidental and split by card cutting, third widely displaced in normal position, Very Fine, ex-W.I. Mitchell, G.C.Slawson. USPCC No. S30c.
Scott No. UX22b; $3,500.

A RARE EXAMPLE OF THE 1910 1¢ BLUE UNSHADED BACKGROUND POSTAL CARD TRIPLE IMPRESSION ERROR. Scott $3,500
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Scott $3,500

1910, 1¢ Blue on Bluish, Rotary Press, Quintuple Impression. Unused card with preprinted address and message, four impressions almost coincidental, fifth widely displaced in normal position, couple light creases, Very Fine. USPCC No. S30eh.
Scott No. UX22d; $7,000.

THE ONLY RECORDED MINT EXAMPLE OF THE 1910 1¢ BLUE UNSHADED BACKGROUND POSTAL CARD QUINTUPLE IMPRESSION ERROR. Scott $7,000
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Scott $7,000