United States 1880 Fort Fetterman Wyoming Territory 3¢ Postal Envelope Sent to Osborne City Kansas; Tied with Bar Cancels and Accompanying Double Circle Date-stamp; The Fort Was Established 19 July 1867 on the North Platte River and Was Discontinued by the Military 6 November 1882; the Post Office Was Established in Albany County 28 January 1873 and Moved to Converse County, Ultimately Closed 31 January 1889; Helbock Rates at Rarity “6”; SCARCE (46-09999)