Denver City, Col., Advertised, Aug 5, 1867, double circle date stamp on small ladies cover to Leavenworth, Kas. forwarded to Denver City, franked with 1861, 3¢ rose (s.e. at left) tied by "Brookfield, N.Y., Jun 14" origin cds and forwarding duplex, Very Fine, the latest recorded usage of this Advertising date stamp. Estimate  $100 - 150. $0 (Image)