Ditunjukkan sekarang: Tonga - Setem-setem bayaran pos (1990 - 1999) - 31 Setem-setem.
29. May WM: Tiada Perforasi: 13¼ x 13¾
![[Princess Diana Commemoration, 1961-1997, jenis ]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/1514-b.jpg)
4. July WM: Tiada Perforasi: 14
![[The 80th Anniversary of the Birth of King Taufa'ahau Tupou IV, 1918-2006, jenis ]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/1518-b.jpg)
23. July WM: Tiada Perforasi: 14 x 14¼
![[Chinese New Year - Year of the Tiger and International Stamp Exhibition "SINGPEX '98" - Singapore, jenis ]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/1519-b.jpg)
26. August WM: Tiada Perforasi: 14 x 14½
![[Birds, jenis BDN]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/BDN-s.jpg)
![[Birds, jenis BDO]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/BDO-s.jpg)
![[Birds, jenis BDP]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/BDP-s.jpg)
![[Birds, jenis BDQ]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/BDQ-s.jpg)
![[Birds, jenis BDR]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/BDR-s.jpg)
![[Birds, jenis BDS]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/BDS-s.jpg)
![[Birds, jenis BDT]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/BDT-s.jpg)
![[Birds, jenis BDU]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/BDU-s.jpg)
| No. | Jenis | D | Warna | Deskripsi |
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| 1523 | BDN | 5(S) | pelbagai warna | Gygis alba | 0.29 | - | 0.29 | - | USD |
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| 1524 | BDO | 10(S) | pelbagai warna | Pachycephala jacquinoti | 0.29 | - | 0.29 | - | USD |
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| 1525 | BDP | 15(S) | pelbagai warna | Tyto alba | 0.29 | - | 0.29 | - | USD |
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| 1526 | BDQ | 20(S) | pelbagai warna | Porphyrio porphyrio | 0.29 | - | 0.29 | - | USD |
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| 1527 | BDR | 30(S) | pelbagai warna | Sula sula | 0.29 | - | 0.29 | - | USD |
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| 1528 | BDS | 40(S) | pelbagai warna | Gallirallus philippensis | 0.29 | - | 0.29 | - | USD |
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| 1529 | BDT | 50(S) | pelbagai warna | Circus approximans | 0.59 | - | 0.59 | - | USD |
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| 1530 | BDU | 55(S) | pelbagai warna | Vini australis | 0.59 | - | 0.59 | - | USD |
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| 1523‑1530 | 2.92 | - | 2.92 | - | USD |
26. August WM: Tiada Perforasi: 14 x 14½
![[Birds, jenis BDV]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/BDV-s.jpg)
![[Birds, jenis BDW]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/BDW-s.jpg)
![[Birds, jenis BDX]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/BDX-s.jpg)
![[Birds, jenis BDY]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/BDY-s.jpg)
![[Birds, jenis BDZ]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/BDZ-s.jpg)
![[Birds, jenis BEA]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/BEA-s.jpg)
![[Birds, jenis BEB]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/BEB-s.jpg)
| No. | Jenis | D | Warna | Deskripsi |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1531 | BDV | 60(S) | pelbagai warna | Fregata minor | 0.59 | - | 0.59 | - | USD |
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| 1532 | BDW | 70(S) | pelbagai warna | Gallicolumba stairii | 0.59 | - | 0.59 | - | USD |
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| 1533 | BDX | 80(S) | pelbagai warna | Phaethon rubricauda | 0.59 | - | 0.59 | - | USD |
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| 1534 | BDY | 1Pa | pelbagai warna | Prosopeia tabuensis | 0.88 | - | 0.88 | - | USD |
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| 1535 | BDZ | 2Pa | pelbagai warna | Ducula pacifica | 1.76 | - | 1.76 | - | USD |
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| 1536 | BEA | 3Pa | pelbagai warna | Pluvialis fulva | 2.94 | - | 2.94 | - | USD |
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| 1537 | BEB | 5Pa | pelbagai warna | Megapodius pritchardi | 5.87 | - | 5.87 | - | USD |
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| 1531‑1537 | 13.22 | - | 13.22 | - | USD |
23. September WM: Tiada Perforasi: 14
![[International Year of the Ocean, jenis ]](https://www.stampworld.com/media/catalogue/Tonga/Postage-stamps/1538-b.jpg)
25. November WM: Tiada Perforasi: 14 x 14½
