A series of holes punched between postage stamps in the sheet to ease separation.
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“...At once authoritative and compelling." Royal Mail’s British Philatelic Bulletin |hello@philatelicdatabase.com
[…] very wide margins into narrow and wide spacing; the measurement horizontally across the stamp, from perforation to perforation, is 24½ mm. in the narrow spacing, and 26½ mm in the wide spacing. This difference […]