| 1978 National Stamp Week booklet, uses block of four 20c Kookaburra min sheet overprinted and numbered with 20c SPECIMEN stamp on cover, UB05 |
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| 1978 National Stamp Week booklet, uses block of four 20c Kookaburra min sheet overprinted and numbered with 20c SPECIMEN stamp on cover, UB05
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Item #: INV-83358
Condition
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