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postage
1950, Jan 21
unwmk p.
9-14.5
1950, Feb 25
1950, Mar 23
Julian Marchlewski death 25th issue
1950, Apr 15
1950, Apr 26
Labor Day 60th issue
1950, Apr 27
23rd Poznan Fair issue
1950, May 15
1950, Jul 20
1950, Aug
1950a issue Bierut no frame (8 stamps)
1950, Aug 18
revolutions execution 25th issue
1950, Aug 31
Polish Peace Congress issue
1950, Nov 13
1950, Dec
1950, Dec 10
Josef Bem death 100th issue
1950, Dec 16
1950b issue Bierut no frame (8 stamps)
airmail
1950, Feb 6 (no perf info)
official
1950
postage due
1950, Feb 25
1950 due issue p.
12x12.5 (7 stamps)
1 to 41 of 41