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Austrian Mint · Austria
Gold Philharmonic 1/4 oz
0.25 troy oz — 99.99% Goldgoldcurrent
Quarter-ounce fractional Philharmonic gold coin. Popular mid-range investment size from the Austrian Mint.
Physical Specifications
| Mass | 7.776 g |
| Troy Ounces | 0.25 oz |
| Diameter | 22 mm |
| Thickness | 1.2 mm |
| Edge | reeded |
| Purity | 99.99% Gold |
| Fineness | 0.9999 |
| Density | 19.3 g/cm³ |
| Face Value | 25 EUR |
| Series | Vienna Philharmonic |
| First Minted | 1989 |
| Ping Frequency | 3,962 Hz |
Authentication Reference
Use these values to verify an authentic Gold Philharmonic 1/4 oz. All tests can be performed with a digital scale, calipers, and the EON ping tester.
Weight
7.776grams
Use a 0.01g digital scale. Calibrate first with a known object (a €2 coin = 8.50g).
Dimensions
Diameter22mm
Thickness1.2mm
Use plastic calipers (not steel — avoid scratching). Or use the camera tool with a bank card as reference (ISO 7810: 85.60mm × 53.98mm).
Acoustic Ping
3,962Hz ±3%
Balance the coin on your fingertip and tap the edge with a pencil or plastic pen. Use the Ping Tester to analyse the ring.