The 100th anniversary of the birth of professor Ivar Wilskman 1954
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1954
The 100th anniversary of the birth of professor Ivar Wilskman
26. February WM: None Design: Olavi Vepsäläinen Engraving: R.Achrén Perforation: 14
![[The 100th anniversary of the birth of professor Ivar Wilskman, type HN]](https://www.stampworld.com/media/catalogue/Finland/Postage-stamps/HN-s.jpg)
