Switzerland
The stamp could only be used for the special post flight Zürich - Bern - Lausanne - Geneva and the return flight on 20 September 1944
| Country: | Switzerland |
| Type: | Postage stamps |
| Series: | Airmail |
| Nominal: | 1.50 Fr. |
| Year: | 1944 |
| Perforation: | comb 11¾ |
| Mintage: | 265,573 |
