1 oz Silver Mexican Libertad specifications and ping frequencies
The 1 oz Silver Mexican Libertad is a silver coin from Mexico (1996–Present), weighing 31.1 g with a diameter of 40 mm. Tapped gently on its edge, a genuine one rings at about 3.9 kHz, 9.1 kHz and 15.9 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 | 3916 Hz · 9096 Hz · 15860 Hz |
|---|---|
| Metal | Silver |
| Composition | 99.9% silver, 0.1% copper |
| Weight | 31.1 g |
| Fine metal content | 31.069 g |
| Diameter | 40 mm |
| Thickness | 3 mm |
| Country | Mexico |
| Years | 1996 - Present |
Compare with the ping frequencies of every supported coin.
How to Spot a Fake Libertad
Counterfeit 1 oz Silver Mexican Libertad coins are increasingly common. Use the acoustic verifier above as your first line of defense, then check these key red flags:
- 🚨Incorrect weight (should be exactly 31.1g)
- 🚨Wrong diameter (should be 40mm) or thickness (should be 3mm)
- 🚨Dull thud instead of clear, sustained bell-like ring
- 🚨Magnetic attraction (genuine .999 silver is not magnetic)
About the Libertad
First minted in 1982, the Silver Libertad is produced by Casa de Moneda de México, the oldest mint in the Americas (founded 1535). The coin features the Angel of Independence (Winged Victory) on the obverse and the Mexican coat of arms surrounded by historical eagle designs on the reverse. Libertads are known for relatively low mintages compared to other major bullion coins, making them popular with collectors.
Authenticate Your Libertad on the Go
Download Pingcoin for iPhone or Android to instantly verify your Libertad and other precious metal coins using acoustic authentication.