| Definitive issue - Portrait Leopold III - type 'open collar' nr 428 |
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Date of issue: 1956-1957.
OBC/COB numbers: 1005-1007
Perforation: 11 1/2
Size:
Composition of the sheets: 150
Printing Process: Steeldeepprint
Number of plates:
Printing Run: Not know
Paper:
1005 - 1F20 - Sepia Brown -other perforation than nr 845
1006 - 2F50 - Orange Red -other perforation than nr 846
1007 - 5F - Green -other perforation than nr 696