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Płońsk is a town northwest of Warsaw.
In Płońsk, Generalgouvernement Warschau overprints (Michel 6-10 and 12-16) were additionally overprinted "Poczta", "Polska" and two bars (size: 16½ x 15 mm). The overprints are black.

![]() Michel 6 |
![]() Michel 7 |
![]() Michel 8 |
![]() Michel 9 |
![]() Michel 10 |
![]() Michel 12 |
![]() Michel 13 |
![]() Michel 14 |
![]() Michel 15 |
![]() Michel 16 |
Examples of Płońsk cancellations