Swift & Co's Express. Paid. frank (Haller FS12, type 2), printed express company frank in double-lined box, on 3c Red on buff Nesbitt entire (U10), cancelled by mostly clear blue oval 'Wells, Fargo & Co. Express Steamboat' express company marking, to San Francisco, trivial toning and edgewear, fresh and very fine, very scarce double express company use, Swift connected with Wells, Fargo at Petaluma Cal., illustrated in Nathan, ex Barkhausen