Τώρα εμφανίζεται Λετονία - Αεροπορικό Ταχυδρομείο (1921 - 1933) - 9 Γραμματόσημα.
10. Ιανουάριος WM: 2 Το μέγεθος του φύλλου: 100 Διάτρηση: 11½
![[Airmail - Different Watermark, τύπος B3]](https://www.stampworld.com/media/catalogue/Latvia/Airmail/B3-s.jpg)
![[Airmail - Different Watermark, τύπος B4]](https://www.stampworld.com/media/catalogue/Latvia/Airmail/B4-s.jpg)
![[Airmail - Different Watermark, τύπος B5]](https://www.stampworld.com/media/catalogue/Latvia/Airmail/B5-s.jpg)
5. Δεκέμβριος WM: 2 Το μέγεθος του φύλλου: 100 Διάτρηση: 10¾
![[Airmail - Not Issued Stamps Overprinted "LATVIJAS AIZSARGI" & Surcharged, τύπος C]](https://www.stampworld.com/media/catalogue/Latvia/Airmail/C-s.jpg)
![[Airmail - Not Issued Stamps Overprinted "LATVIJAS AIZSARGI" & Surcharged, τύπος C1]](https://www.stampworld.com/media/catalogue/Latvia/Airmail/C1-s.jpg)
![[Airmail - Not Issued Stamps Overprinted "LATVIJAS AIZSARGI" & Surcharged, τύπος C2]](https://www.stampworld.com/media/catalogue/Latvia/Airmail/C2-s.jpg)
9. Δεκέμβριος WM: 2 Το μέγεθος του φύλλου: 100 Διάτρηση: 10¾
![[Airmail - Imperforated, τύπος C3]](https://www.stampworld.com/media/catalogue/Latvia/Airmail/C3-s.jpg)
![[Airmail - Imperforated, τύπος C4]](https://www.stampworld.com/media/catalogue/Latvia/Airmail/C4-s.jpg)
![[Airmail - Imperforated, τύπος C5]](https://www.stampworld.com/media/catalogue/Latvia/Airmail/C5-s.jpg)
