Τώρα εμφανίζεται Γκουάμ - Γραμματόσημα (1930 - 1930) - 11 Γραμματόσημα.
8. Απρίλιος WM: Κανένα Διάτρηση: 11
![[Philippines Postage Stamps Overprinted "GUAM - GUARD MAIL", τύπος C]](https://www.stampworld.com/media/catalogue/Guam/Postage-stamps/C-s.jpg)
![[Philippines Postage Stamps Overprinted "GUAM - GUARD MAIL", τύπος C1]](https://www.stampworld.com/media/catalogue/Guam/Postage-stamps/C1-s.jpg)
Ιούλιος WM: Κανένα Διάτρηση: 12
![[Coat of Arms, τύπος D]](https://www.stampworld.com/media/catalogue/Guam/Postage-stamps/D-s.jpg)
![[Coat of Arms, τύπος D1]](https://www.stampworld.com/media/catalogue/Guam/Postage-stamps/D1-s.jpg)
10. Αύγουστος WM: Κανένα Διάτρηση: 11
![[Philippines Postage Stamps Overprinted "GUAM - GUARD - MAIL", τύπος E]](https://www.stampworld.com/media/catalogue/Guam/Postage-stamps/E-s.jpg)
![[Philippines Postage Stamps Overprinted "GUAM - GUARD - MAIL", τύπος E1]](https://www.stampworld.com/media/catalogue/Guam/Postage-stamps/E1-s.jpg)
Δεκέμβριος WM: Κανένα Διάτρηση: 11
![[Philippines Postage Stamps Overprinted, τύπος F]](https://www.stampworld.com/media/catalogue/Guam/Postage-stamps/F-s.jpg)
![[Philippines Postage Stamps Overprinted, τύπος F1]](https://www.stampworld.com/media/catalogue/Guam/Postage-stamps/F1-s.jpg)
![[Philippines Postage Stamps Overprinted, τύπος F2]](https://www.stampworld.com/media/catalogue/Guam/Postage-stamps/F2-s.jpg)
![[Philippines Postage Stamps Overprinted, τύπος F3]](https://www.stampworld.com/media/catalogue/Guam/Postage-stamps/F3-s.jpg)
