Coin Pinger
Acoustic bullion authentication — free, private, on-device
Coin comparison
Silver American Eagle 1 oz vs Silver Philharmonic 1 oz
Distinct rings: how these two silver coins differ on the scale, under the calipers, and — computed from first-principles physics — in the ring.
Official specifications, side by side
| Silver American Eagle 1 oz | Silver Philharmonic 1 oz | |
|---|---|---|
| Weight | 31.103 g | 31.103 g |
| Diameter | 40.6 mm | 37 mm |
| Composition | .999 fine silver | .999 fine silver |
| Mint | United States Mint | Austrian Mint |
Expected ring, mode by mode
| Mode | Silver American Eagle 1 oz | Silver Philharmonic 1 oz |
|---|---|---|
| c0d2 | 3.52–4.00 kHz | 5.10–5.80 kHz |
| c0d3 | 8.18–9.16 kHz | 11.78–13.20 kHz |
| c0d4 | 14.27–15.99 kHz | above 20 kHz |
Their fundamental bands do not overlap: a genuine Silver American Eagle 1 oz rings 3.52–4.00 kHz while a genuine Silver Philharmonic 1 oz rings 5.10–5.80 kHz. The ping alone separates these two coins — before you even reach for a scale. Frequencies are computed from each coin's published mass, diameter, and metal via free circular-plate physics — see the methodology.
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