| 23 April 1981 50th Anniversary of the First Australia-United Kingdom Airmail Flight, (APM 9611) |
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| 23 April 1981 50th Anniversary of the First Australia-United Kingdom Airmail Flight, (APM 9610). From Maylands WA on FDC 152 with both cachets
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Item #: INV-69985
Condition Pmk
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