Now showing: Guyana - Official stamps (1981 - 1988) - 1 stamps.
16. August WM: 1 Perforation: 13½ x 14
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![[Airmail - Postage Stamp Overprinted "OPS"- 6mm High, type K]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/K-s.jpg)
