1 Peso "Cacheton" specifications and ping frequencies
The 1 Peso "Cacheton" is a silver coin from Mexico (1947–1949), weighing 14 g with a diameter of 32 mm. Tapped gently on its edge, a genuine one rings at about 5.8 kHz, 13.3 kHz and 22.9 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 | 5816 Hz · 13298 Hz · 22917 Hz |
|---|---|
| Metal | Silver |
| Composition | 50% silver, 40% copper, 6% nickel, 4% zinc |
| Weight | 14 g |
| Fine metal content | 7.000 g |
| Diameter | 32 mm |
| Thickness | 2 mm |
| Face value | 1 Peso |
| Country | Mexico |
| Years | 1947 - 1949 |
Compare with the ping frequencies of every supported coin.
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