This section describes some unusual covers, handled by the Pneumatic Post system on part of their journeys. See also some of the "Air Mail" items!
|Minipic ||Details |
| ||1882: postcard to the Hotel Royal, Singerstrasse|
| ||1894: Improper but unchallenged use of Hungarian-franked non-pneumatic stationery card|
| ||1900 & 1901: Found In The Letter-box|
| ||1930: A philatelic Zeppelin flight cover|
| ||1938: A difference in handling on Plebiscite Day|
| ||1964: TELEGRAPHENZENTRALSTATION WIEN cancel but not pneumatically transported|