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1951, Apr 15
unwmk p.
9-14.5
1951, Apr 20 ovpted (no wmk info) (no perf info)
1951, Apr 25
1st Polish Science Congress issue unwmk p.
9-14.5 (6 stamps)
1951, Apr 25
Labor Day 1951 issue
1951, Jul 5
Dzerzhinski death 25th issue
1951, Jul 22
7th anniversary of the Polish People's Republic issue
1951, Aug 5
3rd World Youth Festival issue
1951, Sep 1 ovpted (no wmk info) (no perf info)
1951, Sep 8
national sports festival issue unwmk p.
9-14.5
1951, Oct 30
1951, Nov 15
Polish Music Festival 1951 issue
1951, Dec
6-year plan issue (6 stamps)
1952, Jan 18
Polish Workers Party 10th issue
1952, Mar 8
International Women's Day 1952 issue
1952, Mar 28
General Swierczewski-Walter death 5th issue
1952, Apr 18
Bierut 60th issue
1952, Apr 25
5th Peace Race issue
1952, May 1
Labor Day 1952 issue
1952, May 5
140th Anniversary of the Birth of Józef Ignacy Kraszewski issue -
portraits (1952 Poland)
1952, May 10
110th Anniversary of the Birth of Maria Konopnicka issue -
portraits (1952 Poland)
1952, May 20
140th Anniversary of the Birth of Hugo Kollataj issue -
portraits (1952 Poland)
1952, Jun 5
Gogol death 100th issue
1952, Jun 17
1952, Jun 21
1952, Jun 21
1952, Jun 28
shipbuilders day 1952 issue
1952, Jul 17
youth festival 1952 issue
1952, Jul 22
new constitution 1952 issue
1952, Aug 7
1952, Aug 18
1952, Aug 18
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