Erik Boeré Philatelie : Timbre de vânzare - URSS
Prezentat acum: URSS - Timbre poştale (1923 - 1991) - 2 timbre.
18. August WM: Niciunul Marimea foii: 50 Design: I. Levin Perforare: 12 x 12¼
![[International Geophysical Co-operation, Tip BTT]](https://swmedia-4cd6.kxcdn.com/media/catalogue/USSR/Postage-stamps/BTT-s.jpg)
18. August WM: Niciunul Marimea foii: 50 Design: I. Levin Perforare: 12 x 12¼
![[International Geophysical Co-operation, Tip BTT]](https://swmedia-4cd6.kxcdn.com/media/catalogue/USSR/Postage-stamps/BTT-s.jpg)