Switzerland
Now showing: Switzerland - Postage stamps (1849 - 2024) - 1 stamps.
1972
Airmail - Pro Aero
17. February WM: None Sheetsize: 20 Design: Burkard Waltenspül. Engraving: Courvoisier. S.A. Perforation: 11¾
![[Airmail - Pro Aero, type AKZ]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Switzerland/Postage-stamps/AKZ-s.jpg)