Τώρα εμφανίζεται Γουιάνα - Επίσημα γραμματόσημα (1981 - 1988) - 18 Γραμματόσημα.
2. Απρίλιος WM: 1 Διάτρηση: 13½ x 13, 13½ x 14
![[Postage Stamps Overprinted "OPS"- 6mm High & Surcharged, τύπος M]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/M-s.jpg)
![[Postage Stamps Overprinted "OPS"- 6mm High & Surcharged, τύπος M3]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/M3-s.jpg)
![[Postage Stamps Overprinted "OPS"- 6mm High & Surcharged, τύπος M4]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/M4-s.jpg)
![[Postage Stamps Overprinted "OPS"- 6mm High & Surcharged, τύπος M5]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/M5-s.jpg)
![[Postage Stamps Overprinted "OPS"- 6mm High & Surcharged, τύπος M6]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/M6-s.jpg)
![[Postage Stamps Overprinted "OPS"- 6mm High & Surcharged, τύπος M7]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/M7-s.jpg)
![[Postage Stamps Overprinted "OPS"- 6mm High & Surcharged, τύπος M8]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/M8-s.jpg)
| Νούμερο | Τύπος | D | Χρώμα | Περιγραφή |
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| 25 | M | 25/110(C) | ΠΟΛΥΧΡΩΜΟΣ | 0,87 | - | 0,29 | - | USD |
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| 26 | M1 | 30/110(C) | ΠΟΛΥΧΡΩΜΟΣ | 0,87 | - | 0,58 | - | USD |
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| 27 | M2 | 45/220(C) | ΠΟΛΥΧΡΩΜΟΣ | 1,16 | - | 0,58 | - | USD |
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| 28 | M3 | 55/110(C) | ΠΟΛΥΧΡΩΜΟΣ | 1,16 | - | 0,58 | - | USD |
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| 29 | M4 | 60/220(C) | ΠΟΛΥΧΡΩΜΟΣ | 1,16 | - | 0,58 | - | USD |
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| 30 | M5 | 75/220(C) | ΠΟΛΥΧΡΩΜΟΣ | 1,73 | - | 0,87 | - | USD |
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| 31 | M6 | 90/220(C) | ΠΟΛΥΧΡΩΜΟΣ | 1,73 | - | 0,87 | - | USD |
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| 32 | M7 | 120/220(C) | ΠΟΛΥΧΡΩΜΟΣ | 1,73 | - | 1,16 | - | USD |
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| 33 | M8 | 130/220(C) | ΠΟΛΥΧΡΩΜΟΣ | 1,73 | - | 1,16 | - | USD |
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| 34 | M9 | 150/5(C)/$ | ΠΟΛΥΧΡΩΜΟΣ | 6,93 | - | 3,46 | - | USD |
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| 35 | M10 | 200/5(C)/$ | ΠΟΛΥΧΡΩΜΟΣ | 9,24 | - | 4,62 | - | USD |
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| 36 | M11 | 225/5(C)/$ | ΠΟΛΥΧΡΩΜΟΣ | 9,24 | - | 4,62 | - | USD |
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| 37 | M12 | 230/5(C)/$ | ΠΟΛΥΧΡΩΜΟΣ | 9,24 | - | 4,62 | - | USD |
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| 38 | M13 | 260/5(C)/$ | ΠΟΛΥΧΡΩΜΟΣ | 9,24 | - | 5,78 | - | USD |
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| 39 | M14 | 320/5(C)/$ | ΠΟΛΥΧΡΩΜΟΣ | 9,24 | - | 5,78 | - | USD |
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| 40 | M15 | 350/5(C)/$ | ΠΟΛΥΧΡΩΜΟΣ | 9,24 | - | 5,78 | - | USD |
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| 41 | M16 | 600/5(C)/$ | ΠΟΛΥΧΡΩΜΟΣ | 11,55 | - | 9,24 | - | USD |
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| 25‑41 | 86,06 | - | 50,57 | - | USD |
2. Απρίλιος WM: 1 Διάτρηση: 13½ x 13, 13½ x 14
![[Airmail - Postage Stamps Overprinted "OPS"- 6mm High & Surcharged, τύπος M17]](https://www.stampworld.com/media/catalogue/Guyana/Official-stamps/M17-s.jpg)
