Czechoslovakia
Perforation: Comb 11 3/4 + Line 11 1/2 (combined - perforating machine failure)
| Country: | Czechoslovakia |
| Type: | Postage stamps |
| Series: | Hradčany at Prague |
| Nominal: | 30 h |
| Year: | 1920 |
| Size: | 31 x 27 mm |
| Perforation: | 11¾ x 11½ |
