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Date of issue: 10th of September 1955.
OBC/COB numbers: 973-978
Created by : Jean Van Noten
Perforation: 11 1/2
Size:
Composition of the sheets: 50
Printing Process: Screendeepprint
Number of plates:
Printing Run: 973-609.380ex ; 974 - 273.224ex ; 975-212.196ex ; 976 - 215.454ex ; 977-178.807ex ; 978 - 182.778ex
Paper:
973 - 20c+5c - Ernest Solvay
974 - 80c+20c - Jean Jacques Dony
975 - 1F20+30c - Egide Walschaerts
976 - 2F+50c - Leo H. Baekeland
977 - 3F+1F - Jean Etienne Lenoir
978 - 4F+2F - Emiel Fourcault