Below is a combined usage with several stamps. I include a detail of the stamps on the front, as well as those on the back. The latter are mint on cover. Quick links point to pages for each of the aerogrammes, and the images are also thumbnails to these pages: lone usage, with stamps 1 / 2 / 3 / 4 / 5 / 6 / 7 / 8 / 9 / 10