Ora in esposizione: Guyana - Timbri Ufficiali (1981 - 1988) - 11 francobolli.
17. Maggio WM: 1 Dentellatura: 14
![[Postage Stamps Overprinted "OPS" - 6mm High, Scrivi I]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Guyana/Official-stamps/I-s.jpg)
![[Postage Stamps Overprinted "OPS" - 6mm High, Scrivi I1]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Guyana/Official-stamps/I1-s.jpg)
![[Postage Stamps Overprinted "OPS" - 6mm High, Scrivi I2]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Guyana/Official-stamps/I2-s.jpg)
![[Postage Stamps Overprinted "OPS" - 6mm High, Scrivi I3]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Guyana/Official-stamps/I3-s.jpg)
![[Postage Stamps Overprinted "OPS" - 6mm High, Scrivi I4]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Guyana/Official-stamps/I4-s.jpg)
17. Maggio WM: 1 Dentellatura: 14
![[Airmail - Postage Stamps Overprinted "OPS" - 6mm High, Scrivi I5]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Guyana/Official-stamps/I5-s.jpg)
![[Revenue Stamp Overprinted "OPS" - 3mm High, Scrivi J]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Guyana/Official-stamps/J-s.jpg)
16. Agosto WM: 1 Dentellatura: 13½ x 14
![[Airmail - Postage Stamp Overprinted "OPS"- 6mm High, Scrivi K]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Guyana/Official-stamps/K-s.jpg)
WM: 1 Dentellatura: 13½ x 14
![[Postage Stamps Overprinted "OPS", Scrivi L]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Guyana/Official-stamps/L-s.jpg)
Ora in esposizione: Guyana - Timbri Ufficiali (1981 - 1988) - 11 francobolli.
17. Maggio WM: 1 Dentellatura: 14
17. Maggio WM: 1 Dentellatura: 14
16. Agosto WM: 1 Dentellatura: 13½ x 14
WM: 1 Dentellatura: 13½ x 14