Denver City, K.T., Aug 23, 1860 "Tombstone" Postmark, clear strike of san-serif date stamp (first type) on cover to Ohio, with full clear "Hinckley & Co.'s Express, Denver City, Aug 23, 1860" cds, franked with 1857, 3¢ dull red (s.e. at right) tied by grid handstamp, manuscript "Nevada City, K.T., Aug 16th" docketing at left and pencil "8" possible express rate notation, Very Fine, a rare express combination usage of the Denver City san-serif tombstone postmark, known in use for only two weeks in August of 1860. Estimate  $2,000 - 3,000. This letter originated in Nevada City, K.T. where there was no post office until early the next year. It was carried by Hinckley & Co.'s Express to Denver City where it placed in the mails on August 23, 1860. It was most likely carried eastward by the Central Overland, California and Pike's Peak Express Co. $0 (Image)