Various German Mints · Germany
Imperial German gold coin featuring various state rulers, most commonly Kaiser Wilhelm II of Prussia. Contains 7.17g fine gold. Minted 1871-1915.
| Mass | 7.965 g |
| Troy Ounces | 0.2304 oz |
| Diameter | 22.5 mm |
| Thickness | 1.5 mm |
| Edge | reeded |
| Purity | 90% Gold, 10% Copper |
| Fineness | 0.9 |
| Density | 17.2 g/cm³ |
| Face Value | 20 DEM |
| Series | Imperial Mark |
| First Minted | 1871 |
Use these values to verify an authentic German Gold 20 Mark. All tests can be performed with a digital scale, calipers, and the EON ping tester.
Use a 0.01g digital scale. Calibrate first with a known object (a €2 coin = 8.50g).
Use plastic calipers (not steel — avoid scratching). Or use the camera tool with a bank card as reference (ISO 7810: 85.60mm × 53.98mm).