1870, 1¢ ultramarine, H. grill. Horizontal strip of 3, town and cork duplex cancels, well centered throughout, rich vibrant color and discernible grill on each stamp, Extremely Fine, a very scarce multiple, especially in choice condition, with 1999 P.F. certificate.
Scott No. 134; $600 for singles. Scott $600 for singles
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Scott $600 for singles

1870, 15¢ orange, H. grill. Neat town cancel, strong bright color, discernible grill impression, Very Fine, very scarce bearing a town cancel, with 2018 P.F. certificate Graded (VF 80).
Scott No. 141; $1,500. Scott $1,500
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Scott $1,500

1871, 7¢ vermilion, I. grill. Target cancel, rich bright color, well balanced margins and a clear well defined grill impression, Very Fine to Extremely Fine, with 2017 & 2018 P.F. certificates, the latter Graded (VF-XF 85, SSV $1,500).
Scott No. 138A; $850. Scott $850
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Scott $850

1870, 15¢ orange, I. grill. Block of 4, large part o.g., strong bright color and crisp impression; horizontal crease through each stamp and bottom left stamp with a filled thin, F.-V.F. appearance, a great Banknote grill rarity, with block of four listed but unpriced in Scott, with 2018 P.F. certificate.
Scott No. 141A; $66,000 for singles.

THE UNIQUE MINT BLOCK OF FOUR OF THE 1870 15¢ NATIONAL BANKNOTE I GRILL ISSUE.

Starting with the 2013 Scott U.S. Specialized Catalogue, the 1870 Issue "I" Grills were elevated to major catalogue number status. The "I" grills are far scarcer than the regular "H" grills, and collector demand has proved this to be true. Examples for every value up to the 90¢ have been certified, with the high value exceptionally rare. There are only seven unused examples of the 15¢ "I" grill recorded, including this unique block of four. Scott $66,000 for singles
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Scott $66,000 for singles