Bowers Express (Forwarded By), clear full strike of oval handstamp (BOW-100) on 1851 double rate cover to Mount Pleasant, Iowa, entered the mails with "San Francisco, Cal., Jul 15" cds and matching "20" rate, Extremely Fine, an exceptional strike of this early pioneer express company. Estimate  $1,000 - 1,500. Bowers Express operated from late 1849 until October of 1851, carrying from Nevada City area (Caldwell's Upper Crossing) to San Francisco. $0 (Image)