Silver 1 oz APMEX Round specifications and ping frequencies
The Silver 1 oz APMEX Round is a silver coin from (2008–Present), weighing 31.1 g with a diameter of 39 mm. Tapped gently on its edge, a genuine one rings at about 4.4 kHz, 10.0 kHz and 17.3 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 | 4398 Hz · 10035 Hz · 17290 Hz |
|---|---|
| Metal | Silver |
| Composition | 99.9% silver, 0.1% copper |
| Weight | 31.1 g |
| Fine metal content | 31.069 g |
| Diameter | 39 mm |
| Thickness | 3.2 mm |
| Issuer | APMEX |
| Years | 2008 - Present |
Compare with the ping frequencies of every supported coin.
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