The 50th Anniversary of Pro Aero Foundation 1988
Now showing: Switzerland - Postage stamps - 1988 - The 50th Anniversary of Pro Aero Foundation - 1 stamps.
1988
The 50th Anniversary of Pro Aero Foundation
8. March WM: None Design: Hans Hartmann. Engraving: Courvoisier. S.A. Perforation: 11¾
![[The 50th Anniversary of Pro Aero Foundation, type BAL]](https://www.stampworld.com/media/catalogue/Switzerland/Postage-stamps/BAL-s.jpg)
