"Via Pikes Peak Express", manuscript notation on cover franked with 1857 3c Dull red, tied by "Saint Louis Mo. Jun 13 1860" datestamp, addressed "Denver City, KT", without backflap and top edge replaced, otherwise very fine (Image)

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Bent's Fort Col Mar 23, double circle datestamp on cover to Elmira, New York, ragged edges and stamp removed, very fine strike, the earliest of the three recorded examples of this postmark (Image)

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Byers Colo. 27 Dec, datestamp with 1c Postal card to Ellsworth, Maine, message datelined "Denver Dec 26th 75", horizontal crease, still fine, the only recorded territorial postmark from Byers, ex-Bauer (Image)

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Castle Rock Colo Jul 9 9-AM 1928,, flag cancel ties 1c Franklin to picture postcard (Cheyenne Lodge) to Anderson, Indiana, very fine, one of just three recorded examples of this postmark, the rarest flag cancel from Colorado (Image)

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Castle Rock Colo Aug 7 2-PM 1928,, flag cancel ties 1c Franklin to picture postcard (Pioneer Monument in Denver) to Aurora, Illinois, very fine, one of just three recorded examples of this postmark, the rarest flag cancel from Colorado, pictured on the front cover of the August 2014 Colorado Postal Historian (Image)

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Chapin Colo Feb 5 1894, datestamp and target on 2c Green entire to New London, Connecticut, printed cornercard, fine example of this four year post office (1890-94), ex-New (Image)

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Chemung, Colo. Jan 17 1910, four-bar datestamp ties 1c Green to postcard to Hastings, Michigan, very fine strike, this post office only operated 1906-10 (Image)

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Crook Weld County Colorado Nov 12 1883, purple sawtooth postmark with matching grid on 2c Brown Banknote, addressed to Aledo, Illinois, very fine and attractive (Image)

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Deane, Colo Oct 3 1881, datestamp with duplexed star in circle ties 3c Green banknote to cover to Caruth, North Carolina, light wear, very fine strike, the only recorded postal marking from Deane (1879-84) (Image)

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Decatur Colo. Feb 22 1889, datestamp and target on 1c Postal card to Fort Collins, Colorado, filing holes and light wear, fine strike, the earliest recorded postmark from this three year office (1888-91) (Image)

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Fort Lyon, C.T. Apr 10 1863, circular datestamp with matching target tying 1861 3c Rose (65) to cover to Denver City and redirected to Big Thompson, Colorado, manuscript "Due 3", very fine (Image)

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Fort Lyon Col. Jan 23, black datestamp with matching target tying 1868 3c Grilled issue to cover to Worcester, Massachusetts, very fine and choice, ex-Newburn (Image)

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Fort Lyon Colo. Feb 7 1874, octagonal postmark in black with second strike tying 3c Green Banknote to cover to Charles Town, Virginia, original enclosure, slightly reduced at left and stamp small faults, otherwise fine, only a few examples of this postmark recorded (Image)

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Fort Lyon Colo. 31 1876, octagonal datestamp in purple, matching targets tie pair of 3c Green Banknotes to cover to La Crosse, Wisconsin, light wear and reduced at left, very fine strike, only a few examples of this postmark recorded (Image)

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Julesburg Col, watery blue handstamp with matching grid on 3c Green Banknote cover to Island Pond, Vermont, original enclosure, very fine (Image)

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Kit Carson Colo. Apr 1, datestamp with matching grid on 3c Green Banknote cover to Mora, New Mexico, cornercard for "Wholesale Grocers and Commission Merchants", reverse with all-over illustrated street scene advertisement, barely reduced at right, very fine and attractive (Image)

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Pueblo, Colo Mar 18, blue straightline ties 2c and 10c Banknotes to registered cover to Milwaukee, Wisconsin, backflap out, very fine and attractive (Image)

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Rock Ridge, Colo. Jan 24 1880, magenta double circle datestamp with duplexed stock intertwined "US Mail" (Cole US-148) on 3c Green entire to St. Louis, just reduced at right, very fine, the earliest recorded example of this postmark (Image)

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Ruff Colo. Oct 16 1890, datestamp and target on 1c Postal card to McLeansboro, Illinois, very fine, the earliest recorded postmark from Ruff, only in operation 1889-96 (Image)

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Sedalia Colo. Sep 16, datestamp and duplexed target on 1c Postal card to Denver, reverse datelined "Plum, Sept 16, 1874", very fine, one of two recorded territorial postmarks from Sedalia (the other on a piece), ex-Bauer (Image)

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Sedalia, Colo. Mar 11 1888, purple circular datestamp on cover to Buffalo Creek, Colorado, franked with 2c Green Banknote with matching target, receiving postmark at left, edge wear and stamp small nick, otherwise very fine, ex-Engert  (Image)

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Toledo Colo. Apr 24 1888, double rim circular datestamp duplexed with wheel of fortune ties 2c Green Banknote (toned perforations) to cover to Decatur City, Iowa, additionally the same device used as a receiver on a September 24, 1887 (earliest known use), both fine (Image)

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Walsenburgh Col. Feb 1, datestamp and duplexed target on 1c Postal card to Santa Fe, New Mexico, reverse with blue 1876 receiving datestamp, very fine, the only recorded territorial postmark from Walsenburgh, ex-Bauer (Image)

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Early Denver Postal History Collection,, exhibit collection covering the first 60 years of Denver's history in two binders, approximately 110 covers and postcards spanning the 1860s to 1910s, we note 14 territorial covers, early statehood covers, fancy cancels, duplexes, and machine cancels, all fine to very fine and well-organized (Image)

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Denver Metropolitan Area Independent Post Offices Collection,, exhibit collection in two binders containing approximately 135 covers and postcards arranged alphabetically, on pages with historical data about the various offices, primarily 20th Century but some earlier (including a few territorial), better items including Denver territorial with negative "M", earliest recorded Petersburgh, Sanatorium, and Villa Park, generally fine to very fine (Image)

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