This striking 6-stamp set from Deutsche Bundespost celebrates milestones in German industrial and scientific innovation. The vivid modernist designs commemorate:

• 100 Years of Trade Unions (30 Pf),

• 150 Years of Printing Machines – Friedrich Koenig (10 Pf),

• 1000 Years of Harz Mining (20 Pf),

• 75 Years of Three-Phase Electric Power Transmission (20 Pf),

• 100 Years of the Scientific Microscope – Abbe & Zeiss (30 Pf), and

• 100 Years of the Dynamo-Electric Principle (30 Pf).
  Each design uses geometric abstraction and vibrant color to symbolize progress, engineering, and discovery—making this set a hallmark of West German graphic design of the late 1960s.