Example of Universal Koppler, WZR4
- PART OF:
- Two examples of Universal Koppler
One of two examples of Universal Koppler, WZR4 (Dennert und Pape, Hamburg-Altona). Map distance slide-rules-system Benthien
One of two examples of Universal Koppler, WZR4 (Dennert und Pape, Hamburg-Altona). Map distance slide-rules-system Benthien