Washington, D.C., Experimental Cancels, 1893-1907. 5 covers and cards; 2¢ Columbian entire with scarce Late Mail International Machine backstamp, 1907 Krag Reapter Machine postmarks on 2 post cards, 2¢ postal card with Leavitt type C postmark to Belgium (2nd card from Cincinnati to Chile), and 1892 "Unknown" Machine Cancel used Feb 11, 1893 on local use 1¢ blue entire, with original enclosure from the Anthropological Society, F.-V.F. or better. Estimate  $200 - 300. $0 (Image)