Daily from March 31 until October 15 in 1918, Austria operated the first regularly scheduled airmail route in the world (Wien-Krakau-Lemberg-Kiew). Airmail was classified as express service and forwarded pneumatically whenever this would expedite delivery. Franking 15H postage + 1.50 Kreuzer airmail per 20 grams + 1.00 Kreuzer per flight step (Krakau-Wien). The faint "1712" is the acceptance number.
| From: | Krakau 1 (8a) Krakow 1 (dispatching post office) | July 20 1918 |
| Transit: | Flugpost * Poszta Lotnicza * Krakau 1 * Krakow 1 (flight dispatch) | July 20 1918 9:30 am |
| Transit: | Flugpost Wien 1 (flight arrival mark - on back) | July 20 1918 7:00 pm |
| Transit: | 1/1 Wien Telegraphenzentralstation P (pneumatic dispatch mark on back) | July 20 1918 8:10 pm |
| Arrival | 9/2 Wien 71 Lazarettgasse (to left of stamp) | July 20 1918 8:30 pm |