2c black on yellow buff Colombian postal stationery card (H&G 10a) used with AGENCIA POSTAL NACIONAL COLON duplex cds dated 10 JUN 1891. Addressed to UK with arrival cds on reverse. [US4] (Start Price = £9.60)
Canal Zone: 1c green postal stationery card of USA with 'CANAL ZONE' overprint (H&G 9) used with BALBOA 'Map' roller cancel. Addressed to USA with circular 'PASSED BY NAVAL CENSOR' marking in blue. [US1] (Start Price = £17.60)