Silver 1 oz Bounty specifications and ping frequencies
The Silver 1 oz Bounty is a silver coin from the Cook Islands (2011–2023), weighing 31.1 g with a diameter of 38.5 mm. Tapped gently on its edge, a genuine one rings at about 4.8 kHz, 10.4 kHz and 17.8 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 | 4802 Hz · 10384 Hz · 17830 Hz |
|---|---|
| Metal | Silver |
| Composition | 99.9% silver, 0.1% copper |
| Weight | 31.1 g |
| Fine metal content | 31.069 g |
| Diameter | 38.5 mm |
| Thickness | 3.1 mm |
| Face value | $1 Cook Islands |
| Country | Cook Islands |
| Years | 2011 - 2023 |
Compare with the ping frequencies of every supported coin.
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