Lot
31 
Breckenridge P.O., Utah Terr. (After it Became Part of Colorado Territory), 1861 cover from Granville, Ohio address to "Breckenridge P.O., American Gulch, Rocky Mts., Utah Terr.", franked with 1857, 3¢ dull red (gutter straight line at right) tied by grid handstamp, matching "Granville, O., Mar 13" cds alongside, Very Fine.Scott No. 26 Estimate $200 - 300.
Apparently, the knowledge of the creation of Colorado Territory was not yet widespread.