Stamps of Poland, 11.75x11.25 perf
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postage
1976, May 20 Interphil 76 issue unwmk p. 11.75x11.25
| - | 8.40z | gray & multi | stamp outline over Philadelphia |
1991, May 6 Europa 1991 issue
| - | 1000z | multi |
1994, Jan 14
| - | 1500z | multi | I Love You |
2017, Sep 29
| - | A | multi | Polish Operation NKWD |
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