Сега показвам: Британски Гвиана - Пощенски разноски марки (1850 - 1966) - 4 марки.
17. Май воден знак: 5 Пробиване: 11 x 11½
![[The 100th Anniversary of I.T.U., тип CM]](https://www.stampworld.com/media/catalogue/British-Guiana/Postage-stamps/CM-s.jpg)
![[The 100th Anniversary of I.T.U., тип CM1]](https://www.stampworld.com/media/catalogue/British-Guiana/Postage-stamps/CM1-s.jpg)
25. Октомври воден знак: 5 Пробиване: 14½
![[The 20th Anniversary of the United Nations, тип CN]](https://www.stampworld.com/media/catalogue/British-Guiana/Postage-stamps/CN-s.jpg)
![[The 20th Anniversary of the United Nations, тип CN1]](https://www.stampworld.com/media/catalogue/British-Guiana/Postage-stamps/CN1-s.jpg)
