Hermann von Helmholtz (1821-1894) 25 Pf. — Germany, Berlin, 1971
Hermann von Helmholtz (1821-1894) (Germany, Berlin, 1971), face value 25 Pf., “150th birthday of Hermann von Helmholtz” series. Photo, catalogue value…
- Series
- 150th birthday of Hermann von Helmholtz
- Issue date
- 1971
- Face value
- 25 Pf.
- Colors
- Multicolor
- Print run
- 7,500,000