(Langton's) Pioneer Express, Downieville, Cal., S.W.L., clear strike of negative monogram (of Samuel W. Langton) seal handstamp (LAN-401) used in combination with "Paid" in oval handstamp as express frank on fresh 1853, 3¢ Nesbitt entire to San Francisco, matching "Langton's Express, Downieville, Dec 12" oval date stamp canceling, additional blue circular "Langton's Pioneer Express, Marysville" transit handstamp (LAN-105) and matching "Reply By, Langton's Pioneer Express." two-line ad handstamp on reverse, Very Fine and choice; with 2004 P.F. certificate. Estimate  $2,000 - 3,000. A UNIQUE USAGE OF THIS NEGATIVE LANGTON'S MONOGRAM SEAL USED AS PART OF A EXPRESS FRANK. $0 (Image)