Now showing: North Korea - Postage stamps - 1972 - Chemical Industry - 2 stamps.
2. November WM: None Perforation: 11
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![[Chemical Industry, type AOR]](https://www.stampworld.com/media/catalogue/North-Korea/Postage-stamps/AOR-s.jpg)
![[Chemical Industry, type AOS]](https://www.stampworld.com/media/catalogue/North-Korea/Postage-stamps/AOS-s.jpg)
