The 60th Anniversary of the National Hellenic Research Institute 2018
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2018
The 60th Anniversary of the National Hellenic Research Institute
10. October WM: None Perforation: 11¼
![[The 60th Anniversary of the National Hellenic Research Institute, type XRD]](https://www.stampworld.com/media/catalogue/Greece/Postage-stamps/XRD-s.jpg)
