Steamer Winfield Scott. Full sharp strike of red two-line handstamp centrally struck on 1852 folded letter sheet from Valparaiso, Chile to San Francisco, Cal., endorsed "via Panama, pr Vapor Winfield Scott" at top, entered the west coast mails with "San Francisco, Cal., Apr 29" cds and matching "Ship 6" clamshell ship rate handstamp, Extremely Fine, a wonderful and unique via Panama transit usage aboard the Steamer Winfield Scott's maiden voyage from New York to San Francisco for its service between Panama & S.F. for the Independent Line, only nine examples of this two-line steamer handstamp are recorded, ex Haas. Estimate  $1,500 - 2,000. $0 (Image)