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Various German Mints · Germany
German Gold 20 Mark
0.2304 troy oz — 90% Gold, 10% Coppergolddiscontinued
Imperial German gold coin featuring various state rulers, most commonly Kaiser Wilhelm II of Prussia. Contains 7.17g fine gold. Minted 1871-1915.
Physical Specifications
| 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 |
Authentication Reference
Use these values to verify an authentic German Gold 20 Mark. All tests can be performed with a digital scale, callipers, and the EON ping tester.
Weight
7.965grams
Use a 0.001 g digital scale. Calibrate first with a known object (a €2 coin = 8.50g).
Dimensions
Diameter22.5mm
Thickness1.5mm
Use plastic callipers (not steel — avoid scratching). Or use the camera tool with a bank card as reference (ISO 7810: 85.60mm × 53.98mm).