The IMPERFORATE Navigator mini sheets issued at the exhibition caused a sensation when it was discovered only 30,000 sets were issued - and about half of those received the "A99" perfin.  (See lowest sheet photo.)  The "brown" sheet all got a rare 15½ perf gauge.  Therefore only 15,000 stamps can exist with that perf.

They are well catalogued in all international stamp catalogues.  See the official letter from Australia Post (BELOW)

I have good stocks and these are easily the scarcest post-war Australia post issue.  Tuck a few sets away for the future - or your collection.

The Seven Seas "ASC" Catalogue value on this pair is $A120.  My special price is HALF Cat - $A70 a pair MUH. (Stock 583GH)  5 sets for $A300. (Stock 583GU) 10 sets for $A500 (Stock 583GB)

For far more details on this issue - click here: https://www.glenstephens.com//sept99text.html                 

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