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| Number | KM# 31 |
|---|---|
| Country | Tonga |
| Period | Kingdom of Tonga (1967 - 2018) |
| Ruler | Tāufaʻāhau Tupou IV |
| Currency | Tongan paʻanga |
| Coin type | Circulation coins |
| Denomination | 20 seniti |
| Year | 1968 - 1974 |
| Edge type | Reeded |
| Shape | Round |
| Alignment | Medal (0°) |
| Composition | Copper-Nickel |
| Weight (g) | 11.3 |
| Diameter (mm) | 28.5 |
| Thickness (mm) | 1.25 |
![]() | Royal family Description Legend |
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![]() | Coat of arms Legend |
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| Year | Mintage | Rarity | Value, USD | ||
|---|---|---|---|---|---|
| UNC | BU | Proof | |||
| 1974 | 50.000 | + | - | C | $ 10.22 |
| 1968 | 35.000 | + | + | ||
