Clipperton Island-San Francisco, (unstated value) Violet Brown (Unlisted in Scott). Well-centered, used with 5c Chocolate (270) tied by segmented cork cancels, "San Francisco, Cal. Apr. 3, 12:30 PM 96" circular datestamp and duplex numeral oval grid on cover to Birmingham, England, W. Frese & Co. San Francisco corner card, receiving backstamp

A VERY FINE AND EXTREMELY RARE COVER FRANKED WITH THE CLIPPERTON ISLAND PRIVATE FRANKING STAMP.

Clipperton Island lies 670 miles southwest of Mexico in the eastern Pacific Ocean. It was an important source of guano fertilizer and home to 150-200 miners at the time the Clipperton Island stamp was issued for use on mail carried from the island to San Francisco. This cover to England entered the mails at San Francisco and is additionally franked with the proper 5c U.S. postage for the U.P.U. rate. Very few Clipperton Island covers are known.

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