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200th birthday of Julius Robert von Mayer issue of Germany

  • Colnect-2406-060-Scale-for-equivalence-of-heat-and-energy.jpg
Short desc: 200th birthday of Julius Robert von Mayer

Issuer: Germany
Date: 11/3/2014
Sort position: 3
Occasion: unset


Consists of 1 stamp: (See stamps as list)

90c d=Scale for equivalence of heat & energy

All are perf=13.75


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