Carl Zeiss, Jena Nr. 11794

 Pulfrich Refractometer c. 1920

 

Carl Zeiss, Jena Nr. 11794. Pulfrich Refractometer c. 1920

Carl Zeiss, Jena Nr. 11794. Pulfrich Refractometer c. 1920

 

Carl Zeiss, Jena Nr. 11794. Pulfrich Refractometer c. 1920

 

Pulfrich Refractometer

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