German Empire
| Country: | German Empire |
| Type: | Postage stamps |
| Series: | Semi Air postal stamps |
| Nominal: | None |
| Year: | 1912 |
| Material: | chalky |
| Perforation: | Imperforate |
| Mintage: | 90 |
Semi Air postal stamps
 Wood pigeon - ovpt 10 Pfg. Segelflüge Pforzheim in black |  Air post stamp for Borkbrück |