Empire City, Col., Sep 2, cds and matching target handstamp tying 3¢ Banknote on cover to Denver City, C.T., with original 1872 "Registered - Letter Receipt" enclosure (nick at top left) with similar Empire City and "Denver, Colo., Registered, Sep 8" cds's, Very Fine. Estimate  $100 - 150. $0 (Image)