cover Worldwide Covers, mostly 20th Century, many hundreds of covers in one large carton, some better U.S. covers incl. three Bank Note illustrated ad covers, five 2c Parcel Post stamps used as first class postage on separate covers, quantity of commercially used foreign covers incl. some better, various mostly U.S. flight covers, events, CAM's, anniversaries, airport dedications, first days, also a quantity of Canadian flight covers, very mixed condition, but a useful lot, good-very fine