Austria
Prezentat acum: Austria - Timbre poştale (1850 - 2024) - 1 timbre.
1961
The 75th Anniversary of Sonnblick Observatory
1. Septembrie WM: Niciunul Design: H. Ranzoni D.J. Perforare: 14½ x 13¾
![[The 75th Anniversary of Sonnblick Observatory, Tip XS]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Austria/Postage-stamps/XS-s.jpg)