(abbr.) marking on British postage-paid envelope; ‘A’ indicates mail originates in Britain and was shipped to the U.S. as freight; first ‘B’ indicates entry into the U.S. postal system, second ‘B’ indicates delivery in the U.S.
(abbr.) marking on British postage-paid envelope; ‘A’ indicates mail originates in Britain and was shipped to the U.S. as freight; first ‘B’ indicates entry into the U.S. postal system, second ‘B’ indicates delivery in the U.S.
