Stamps of Portugal, 13.25x13.5 perf
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postage
1971, Feb 24 windmills (1971) unwmk p. 13.25x13.5 (6 stamps)
| X | 20c | multi | mountain windmill of the Bussaco hills | |||
| X | 50c | multi | windmill of Beira Litoral | |||
| X | 1e | multi | ||||
| - | 2e | multi | ||||
| X | 3.30e | multi | ||||
| - | 5e | multi |
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