Silver 1 oz Britannia (1997–2012) specifications and ping frequencies
The Silver 1 oz Britannia (1997–2012) is a silver coin from the United Kingdom, weighing 32.45 g with a diameter of 40 mm. Tapped gently on its edge, a genuine one rings at about 4.3 kHz, 9.8 kHz and 16.9 kHz: its first resonance frequencies, set by its metal, size and thickness. A counterfeit made of a different metal, or with a different weight or thickness, rings at different frequencies, which is what the ping test above checks.
| Ping test reference frequencies | 4262 Hz · 9766 Hz · 16866 Hz |
|---|---|
| Metal | Silver |
| Composition | 95.8% silver, 4.2% copper |
| Weight | 32.45 g |
| Fine metal content | 31.087 g |
| Diameter | 40 mm |
| Thickness | 3 mm |
| Face value | 2 Pounds |
| Country | United Kingdom |
| Years | 1997 - 2012 |
Compare with the ping frequencies of every supported coin.
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