Holladay Overland Mail & Express Co., black printed company frank on 1864, 3¢ pink entire to Lexington, Mich., entered the mails with "Laporte, Col., Sep 16" cds canceling; cover slightly reduced at right, Very Fine, one of two recorded examples of a Colorado postal marking on a Holladay franked envelope and a rare usage of the Laporte handstamp postmark. Estimate  $400 - 600. $0 (Image)