Ora in esposizione: Guatemala - Tassa francobolli posta aerea (1930 - 1939) - 3 francobolli.
10. Gennaio WM: Nessuno Dentellatura: 14
![[The 150th Anniversary of the US Constitution - Central Post Office Stamp of 1927 Overprinted, Scrivi B5]](https://www.stampworld.com/media/catalogue/Guatemala/Air-tax-stamps/B5-s.jpg)
13. Aprile WM: Nessuno Dentellatura: 14
![[Central Post Office Stamp of 1927 Overprinted "1938" in Red or Blue, Scrivi B6]](https://www.stampworld.com/media/catalogue/Guatemala/Air-tax-stamps/B6-s.jpg)
20. Novembre WM: Nessuno Dentellatura: 14
![[Stamp Exhibition, Guatemala City - Central Post Office Stamp of 1927 Overprinted, Scrivi B7]](https://www.stampworld.com/media/catalogue/Guatemala/Air-tax-stamps/B7-s.jpg)
