Luftpost
![Bulgarien 1939](/image/133371/base250X250/bulgarien-1939-bulgaria-1-plus-pair-2-plus-30-l-on-cover-par-avion-from-sofia-26.jpg)
Bulgarien, Michel 240+, Brief
1939. BULGARIA. 1 + pair 2 + 30 L on cover PAR AVION from Sofia 26.X.39 to Linköping, Sweden.
![Schweden 1948](/image/68884/base250X250/schweden-1948-sverige-cover-with-4-stamps-from-malmoe-31-7-1948-33a-universala.jpg)
Schweden, Brief
1948. SVERIGE. Cover with 4 stamps from MALMÖ 31.7.1948 33A UNIVERSALA KONGRESO DE ESPERANTO to Sofia, Bulgarien. Several cancels including Retour..
Michel 343+
![Schweden 1929](/image/68810/base250X250/schweden-1929-sverige-10-luftpost-plus-10-plus-5-oere-kongres-on-cover-stockholm.jpg)
Schweden, Brief
1929. SVERIGE 10 LUFTPOST + 10 + 5 öre KONGRES on cover STOCKHOLM-KALMAR-STETTIN-BERLIN-WIEN 22 6 29 LUFTPOST. to Braunschweig, Deutschland. Transit cancel BERLIN- ZENTRALFLUGHAFEN 22.6.29. LUFTPOST FRÅN KALMAR.__ Med Luftpost Kalmar-Stettin-Berlin.
Michel 138+
![Schweden 1929](/image/68753/base250X250/schweden-1929-sverige-7-10-plus-4-block-12-65-oere-gustav-v-medalion-on-cover.jpg)
Schweden, Brief
1929. SVERIGE 7/10 + 4-block 12/65 öre Gustav V Medalion on cover STOCKHOLM-KALMAR-STETTIN-BERLIN-WIEN 22 6 29 LUFTPOST. to Sofia, Bulgarien. Arrival cancel SOFIA 24. VI. 29. Several transit cancels both on front and reverse including LUFTPOST FRÅN KALMAR. (Lüning 93A4.) Unusual destination.
Michel 111+
![Bulgarien 1932](/image/31302/base250X250/bulgarien-1932-luftpostausstellung-in-strassburg-10-plus-24-plus-28-l-rousse-9.jpg)
Bulgarien, Michel 249-251, Brief
1932. Luftpostausstellung in Strassburg 10 + 24 + 28 L. ROUSSE 9.IV.32. Nach Paris, France. Rec.