Prezentat acum: Guyana - Timbre oficiale (1981 - 1988) - 11 timbre.
17. Mai WM: 1 Perforare: 14
![[Postage Stamps Overprinted "OPS" - 6mm High, Tip I]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/I-s.jpg)
![[Postage Stamps Overprinted "OPS" - 6mm High, Tip I1]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/I1-s.jpg)
![[Postage Stamps Overprinted "OPS" - 6mm High, Tip I2]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/I2-s.jpg)
![[Postage Stamps Overprinted "OPS" - 6mm High, Tip I3]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/I3-s.jpg)
![[Postage Stamps Overprinted "OPS" - 6mm High, Tip I4]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/I4-s.jpg)
17. Mai WM: 1 Perforare: 14
![[Airmail - Postage Stamps Overprinted "OPS" - 6mm High, Tip I5]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/I5-s.jpg)
![[Revenue Stamp Overprinted "OPS" - 3mm High, Tip J]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/J-s.jpg)
16. August WM: 1 Perforare: 13½ x 14
![[Airmail - Postage Stamp Overprinted "OPS"- 6mm High, Tip K]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/K-s.jpg)
WM: 1 Perforare: 13½ x 14
![[Postage Stamps Overprinted "OPS", Tip L]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/L-s.jpg)
Prezentat acum: Guyana - Timbre oficiale (1981 - 1988) - 11 timbre.
17. Mai WM: 1 Perforare: 14
17. Mai WM: 1 Perforare: 14
16. August WM: 1 Perforare: 13½ x 14
WM: 1 Perforare: 13½ x 14