Rāda: Panamas kanāla zona - Pastmarkas (1904 - 1978) - 1 marka.
1948
The 25th Anniversary of Establishment of Canal Zone Biological Area
17. aprīlis SV: Neviens Perforēšana: 11
![[The 25th Anniversary of Establishment of Canal Zone Biological Area, veids BF]](https://www.stampworld.com/media/catalogue/Canal-Zone/Postage-stamps/BF-s.jpg)
