(Wells, Fargo & Co.) "W. F. & Co." Large Overprint, on 1864 3¢ pink entire used within San Francisco, entire with all-over advertising in light greenish blue of Importer of Cigars and Tobacco, blue "Paid" in oval express handstamp, vertical frank at left; some edge toning and slight soiling, Fine, very rare with only five or six known of the two varieties. Estimate  $400 - 600. This large "Wells, Fargo & Co." overprint was used on remainder covers of business who failed and turned in the unused envelopes to Wells, Fargo & Co. for credit of the unused postage. $0 (Image)