Now showing: Guatemala - Air tax stamps (1919 - 1945) - 2 stamps.
1940
Central Post Office Stamp of 1927 Overprinted "1940" in Dark Purple or Dark Brown
January WM: None Perforation: 14
![[Central Post Office Stamp of 1927 Overprinted "1940" in Dark Purple or Dark Brown, type B9]](https://www.stampworld.com/media/catalogue/Guatemala/Air-tax-stamps/B9-s.jpg)
1940
The 50th Anniversary of Pan American Union - Central Post Office Stamp of 1927 Overprinted
14. March WM: None Perforation: 14
![[The 50th Anniversary of Pan American Union - Central Post Office Stamp of 1927 Overprinted, type B10]](https://www.stampworld.com/media/catalogue/Guatemala/Air-tax-stamps/B10-s.jpg)
