Now showing: Guyana - Official stamps (1981 - 1988) - 18 stamps.
2. April WM: 1 Perforation: 13½ x 13, 13½ x 14
![[Postage Stamps Overprinted "OPS"- 6mm High & Surcharged, type M]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/M-s.jpg)
![[Postage Stamps Overprinted "OPS"- 6mm High & Surcharged, type M3]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/M3-s.jpg)
![[Postage Stamps Overprinted "OPS"- 6mm High & Surcharged, type M4]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/M4-s.jpg)
![[Postage Stamps Overprinted "OPS"- 6mm High & Surcharged, type M5]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/M5-s.jpg)
![[Postage Stamps Overprinted "OPS"- 6mm High & Surcharged, type M6]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/M6-s.jpg)
![[Postage Stamps Overprinted "OPS"- 6mm High & Surcharged, type M7]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/M7-s.jpg)
![[Postage Stamps Overprinted "OPS"- 6mm High & Surcharged, type M8]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/M8-s.jpg)
| No. | Type | D | Color | Description |
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| 25 | M | 25/110(C) | multicoloured | 0.78 | - | 0.26 | - | USD |
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| 26 | M1 | 30/110(C) | multicoloured | 0.78 | - | 0.52 | - | USD |
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| 27 | M2 | 45/220(C) | multicoloured | 1.05 | - | 0.52 | - | USD |
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| 28 | M3 | 55/110(C) | multicoloured | 1.05 | - | 0.52 | - | USD |
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| 29 | M4 | 60/220(C) | multicoloured | 1.05 | - | 0.52 | - | USD |
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| 30 | M5 | 75/220(C) | multicoloured | 1.57 | - | 0.78 | - | USD |
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| 31 | M6 | 90/220(C) | multicoloured | 1.57 | - | 0.78 | - | USD |
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| 32 | M7 | 120/220(C) | multicoloured | 1.57 | - | 1.05 | - | USD |
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| 33 | M8 | 130/220(C) | multicoloured | 1.57 | - | 1.05 | - | USD |
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| 34 | M9 | 150/5(C)/$ | multicoloured | 6.28 | - | 3.14 | - | USD |
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| 35 | M10 | 200/5(C)/$ | multicoloured | 8.37 | - | 4.18 | - | USD |
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| 36 | M11 | 225/5(C)/$ | multicoloured | 8.37 | - | 4.18 | - | USD |
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| 37 | M12 | 230/5(C)/$ | multicoloured | 8.37 | - | 4.18 | - | USD |
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| 38 | M13 | 260/5(C)/$ | multicoloured | 8.37 | - | 5.23 | - | USD |
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| 39 | M14 | 320/5(C)/$ | multicoloured | 8.37 | - | 5.23 | - | USD |
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| 40 | M15 | 350/5(C)/$ | multicoloured | 8.37 | - | 5.23 | - | USD |
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| 41 | M16 | 600/5(C)/$ | multicoloured | 10.46 | - | 8.37 | - | USD |
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| 25‑41 | 77.95 | - | 45.74 | - | USD |
2. April WM: 1 Perforation: 13½ x 13, 13½ x 14
![[Airmail - Postage Stamps Overprinted "OPS"- 6mm High & Surcharged, type M17]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/M17-s.jpg)
