USA – Wells, Fargo & Co. Pony Express, $4.00 Black. – worth US.$.550,000

Position 14, large margins to ample at bottom left, sharp impression on bright paper, tied by blue “Pony Express, San Francisco, Aug. 10” (1861) Running Pony oval datestamp, large blue “Wells, Fargo & Cos. Express, S.Frco. 10 Aug.” double-circle datestamp on 8-1/8 by 3-1/2 inch legal-size cover addressed “To The Hon. Fifth Auditor of The Treasury of the U.S., Washington, D.C.” with return address at upper right “U.S. Consulate, Honolulu H.I.”, red seal on back with embossed “CONSULATE U.S. HONOLULU, OAHU H.I.” and American eagle, faint pencil “$4 Pony” around stamp, two clear strikes of “Forwarded by McRuer & Merrill, San Francisco” double-line oval handstamp on back, green “St. Joseph Mo. Aug. 22” circular datestamp, mailed from St. Joseph to Washington D.C. free of postage (official Treasury Department mail), some stains around letters of address have been lightened, the markings are unaffected