H.A.L.HUGHES AND CO., STAMP DEALERS, PETERBOROUGH /USA POSTAGE DUE AND 'OFFICIALLY SEALED' LABELS. 1939 envelope sent registered mail Peterborough to Missouri, USA with KGVI ½d (SG462) and 6d (SG470) cancelled PETERBOROUGH 15 MY 39 and on front US 10c postage due for customs clearance. On reverse fine printed label from H.A.L.HUGHES overlaid with USA 'OFFICIALLY SEALED' label. Good usage. (Ref 97433).