The 350th Anniversary of the Invention of the Calculating Machine 1973
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1973
The 350th Anniversary of the Invention of the Calculating Machine
12. juni WM: Geen Perforatie: 14.
![[The 350th Anniversary of the Invention of the Calculating Machine, type UW]](https://www.stampworld.com/media/catalogue/Germany/Postage-stamps/UW-s.jpg)
