Hermann von Helmholtz

West Berlin

                                                       

1971.    150th Birth anniversary of Helmholtz

 

SGB394 25 pfennig Helmholtz

First day covers

 

Federal Republic of Germany

1994.    Centenary death of Helmholtz

 

SG2594 100pf Helmholtz

First day cover

First day card

 

Democratic Republic of Germany

1950.    Academy of science, Berlin

 

SGE24 10 pfennig Helmholtz

 

 

 

Postcard

 

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