The 150th Anniversary of the Scientific Society in Plock, founded in 1820 1970
Now showing: Poland - Postage stamps - 1970 - The 150th Anniversary of the Scientific Society in Plock, founded in 1820 - 1 stamps.
1970
The 150th Anniversary of the Scientific Society in Plock, founded in 1820
3. June WM: None Sheetsize: 30 Design: Henryk Chyliński Engraving: PWPW. Perforation: 11¾
![[The 150th Anniversary of the Scientific Society in Plock, founded in 1820, type BHP]](https://www.stampworld.com/media/catalogue/Poland/Postage-stamps/BHP-s.jpg)
