Australian Online Stamp Catalogue
 
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1915 King George V Officials
Designers: H. Altmann & R. A. Harrison Engraver; T. S. Harrison - Printer: J. B. Cooke until May, 1918, then T. S.
Harrison
Watermark 43 - Large Crown over Large letter "A"
Issued between 1915 & 1924 with Perforation as below

2-2-1 SOS ½d Green, Small OS Official, perforation 14;
2-15-1 SOS 4d Orange, Small OS Official, perforation 14;
2-21-1 SOS 5d Brown, Small OS Official, perforation 14.2