Redefinition of the SI Base Units 2019
Now showing: South Korea - Postage stamps - 2019 - Redefinition of the SI Base Units - 1 stamps.
2019
Redefinition of the SI Base Units
20. May WM: None Sheetsize: 16 Design: Eun-kyung Park Perforation: 13 x 13¼
![[Redefinition of the SI Base Units, type DOB]](https://www.stampworld.com/media/catalogue/South-Korea/Postage-stamps/DOB-s.jpg)
