Air mail semi-postal stamps
![Stamp picture](/latvia/thumbnails/tn_CB01.jpg) May 26, 1930 | ![Stamp picture](/latvia/thumbnails/tn_CB01a.jpg) May 26, 1930 | ![Stamp picture](/latvia/thumbnails/tn_CB02.jpg) May 26, 1930 | ![Stamp picture](/latvia/thumbnails/tn_CB02a.jpg) May 26, 1930 | ![Stamp picture](/latvia/thumbnails/tn_CB03.jpg) Dec 5, 1931 | ![Stamp picture](/latvia/thumbnails/tn_CB03a.jpg) Dec 5, 1931 | ![Stamp picture](/latvia/thumbnails/tn_CB04.jpg) Dec 5, 1931 | ![Stamp picture](/latvia/thumbnails/tn_CB04a.jpg) Dec 5, 1931 |
![Stamp picture](/latvia/thumbnails/tn_CB05.jpg) Dec 5, 1931 | ![Stamp picture](/latvia/thumbnails/tn_CB05a.jpg) Dec 5, 1931 | ![Stamp picture](/latvia/thumbnails/tn_CB06.jpg) Jun 17, 1932 | ![Stamp picture](/latvia/thumbnails/tn_CB06a.jpg) Jun 17, 1932 | ![Stamp picture](/latvia/thumbnails/tn_CB07.jpg) Jun 17, 1932 | ![Stamp picture](/latvia/thumbnails/tn_CB07a.jpg) Jun 17, 1932 | ![Stamp picture](/latvia/thumbnails/tn_CB08.jpg) Jun 17, 1932 | ![Stamp picture](/latvia/thumbnails/tn_CB08a.jpg) Jun 17, 1932 |
![Stamp picture](/latvia/thumbnails/tn_CB09.jpg) Dec 7, 1932 | ![Stamp picture](/latvia/thumbnails/tn_CB09a.jpg) Dec 7, 1932 | ![Stamp picture](/latvia/thumbnails/tn_CB10.jpg) Dec 7, 1932 | ![Stamp picture](/latvia/thumbnails/tn_CB10a.jpg) Dec 7, 1932 | ![Stamp picture](/latvia/thumbnails/tn_CB11.jpg) Dec 7, 1932 | ![Stamp picture](/latvia/thumbnails/tn_CB11a.jpg) Dec 7, 1932 | ![Stamp picture](/latvia/thumbnails/tn_CB12.jpg) Dec 7, 1932 | ![Stamp picture](/latvia/thumbnails/tn_CB12a.jpg) Dec 7, 1932 |
![Stamp picture](/latvia/thumbnails/tn_CB13.jpg) Dec 7, 1932 | ![Stamp picture](/latvia/thumbnails/tn_CB13a.jpg) Dec 7, 1932 | ![Stamp picture](/latvia/thumbnails/tn_CB14.jpg) Mar 15, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB14a.jpg) Mar 15, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB15.jpg) Mar 15, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB15a.jpg) Mar 15, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB16.jpg) Mar 15, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB16a.jpg) Mar 15, 1933 |
![Stamp picture](/latvia/thumbnails/tn_CB17.jpg) Mar 15, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB17a.jpg) Mar 15, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB18.jpg) Jun 15, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB18a.jpg) Jun 15, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB19.jpg) Jun 15, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB19a.jpg) Jun 15, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB20.jpg) Jun 15, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB20a.jpg) Jun 15, 1933 |
![Stamp picture](/latvia/thumbnails/tn_CB21.jpg) Sep 5, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB21a.jpg) Sep 5, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB22.jpg) Sep 5, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB22a.jpg) Sep 5, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB23.jpg) Sep 5, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB23a.jpg) Sep 5, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB24.jpg) Sep 5, 1933 | ![Stamp picture](/latvia/thumbnails/tn_CB24a.jpg) Sep 5, 1933 |