San Francisco '40' 1 May, red integral rate cds and matching "Paid" handstamp adjacent on blue folded letter datelined "San Francisco April 30. 1850" and addressed to New York, pencil charge box number, put on the PMSS "Panama" arriving at Panama on May 21st and transferred to USMSS "Georgia" leaving Chagres May 26th and arriving at New York on June 9th., Very Fine. Estimate  $400 - 600. THE EARLIEST RECORDED DATE OF THE SECOND SAN FRANCISCO CDS WITH SANS SERIF LETTERS. $0 (Image)