Barnum, 6/26/77 (Gunnison), manuscript postmark tying 3¢ Banknote on cover to Lake City, Colo., blue bank receiving handstamp, with original enclosure datelined Gunnison Valley; couple small flaws, F.-V.F., the only reported cover from this five year Post Office. Estimate  $750 - 1,000. $0 (Image)