SG O123(var)/ACSC 141(OS)z: 1931 3d Kingsford Smith

OS’ overprint.  An upper left corner example with PLATE NO. 1 in selvedge.  Catalogue for a plate number block of 4 is $6,000.  This mint single example is very fresh and lightly hinged in upper selvedge only.  BPA (London) Certificate.


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