(Klamath) Fort Klamath, Oreg. 2 covers: first with neat manuscript postmark "Apr 9th 80" on pen cancelled 3¢ green entire, to Denver, tear and slight reduction at right; other has double circle postmark "Aug 25 1880" and target cancel on 3¢ green entire, reduced at left, F.-V.F., R-7, 6. Estimate  $150 - 200. $0 (Image)