Half Guinea
The Half Guinea is a historic British 22 carat gold coin. Exact diameter and weight can vary slightly by reign, issue, and wear, so historic tolerance should be wider than for modern bullion.
| Country | |
| Mint | |
| Period | 1669–1813 |
| Metal | Gold |
| Type | Coin - |
| Weight | 4.2g |
| Purity | 0.9167 |
| Diameter | 20mm |
| Category | Gold Coins |
| Tags | Gold Coin |
| Contributor | admin |
| Added | May 27, 2026 |
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Excellent library! Very accurate test data for Canadian Maple Leafs. Helped me verify several coins with confidence.
Great reference data. Would be nice to have more variations from different years, but overall very useful.