Czechoslovakia
The aircraft on overprint was inspired by british transport type Handley Page O, first flown in 1915.
| Country: | Czechoslovakia |
| Type: | Postage stamps |
| Series: | II. Air provisional arrangement |
| Nominal: | 250 h |
| Year: | 1922 |
| Size: | 31 x 27 mm |
| Perforation: | line 13¾ |
| Mintage: | 2,720,000 |
II. Air provisional arrangement
 Hospodářství a věda |  Hospodářství a věda |  Hospodářství a věda |