6c Green Nesbitt entire (U13).
Used with horizontal strip of four of 1c Blue, Ty. IV (9),
full margins to slightly in, tied by lightly struck "San Francisco Cal. 10 May" (ca. 1855) circular datestamp to Strickland Ferry Me., lightly cleaned, strip lifted and reaffixed, otherwise Very Fine, scarce used of 1c 1851 to uprate 6c entire after transcontinental rate increased from 6c to 10c in April 188, ex Seybold, Jessup, Pearce and Haas
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