Mill City, Colorado, Aug 15/67, neat manuscript postmark at left of cover to Philadelphia, Pa., franked with manuscript canceled 1861, 3¢ rose; small tear in stamp, Very Fine and attractive. Estimate  $200 - 300. Mill City was an important smelter town and stagecoach stop. The post office became Dumont in 1879, after the territorial period. $0 (Image)