Polish Post: An anniversary stamp for General Kazimierz Sosnkowski

The Polish Post Office prepared a peculiar philatelic issue "General Kazimierz Sosnkowski (1885–1969)". The stamp was introduced into circulation on 19 November 2023 – on the 138th anniversary of the General's birth. The authoritative presentation of the stamp was held on 22 November at the Polish Post Office in Warsaw.