Stamps of Poland, 28 Mar 1957
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airmail semipostal
1957, Mar 28 Polish Philatelic Exhibition 1957 issue unwmk
| - | 4z+2z | bl | abstract wing & letter, imperf | — | — | |
| - | 4z+2z | bl | abstract wing & letter |
1 to 2 of 2
| - | 4z+2z | bl | abstract wing & letter, imperf | — | — | |
| - | 4z+2z | bl | abstract wing & letter |