Hinckley & Co.'s Express/Denver City/Jun. 14/1860. Black circle handstamp tying 1857 3¢ dull red type II on cover to Canton Centre, Connecticut, additionally tied by "The Central Overland California & Pikes Peak Express Company/Denver City K.T. (Kansas Territory, now Colorado)/Jun 14" black oval handstamp and blue "Saint Joseph, Mo., Jun 21, 1860" cds, Very Fine and attractive, an early use of the Hinckley handstamp; with 1980 P.F. certificate. Estimate  $750 - 1,000. The wonderful cover was carried from the mines to Denver by Hinckley's and transferred to The Central Overland California & Pikes Peak Express Company, who carried the cover from Denver to St. Joseph where it entered the United States postal system. $0 (Image)