SAN FRANCISCO. Clear strike of straightline handstamp with ms. "June 20" date and "40" rate on cover to New York, with original contents dated 1849, sender's instructions
"via Panama p. 'California'", fresh and Very Fine, desirable example of the scarce San Francisco straightline, the first handstamp used at the San Francisco post office, ex Haas
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E. 1,500-2,000