German Empire
Mi: DR I overprinted in dark blue by " - 1M - Gelber Hund"
| Country: | German Empire |
| Type: | Postage stamps |
| Series: | Airmail on Rhine and Main |
| Nominal: | 1 German reichsmark |
| Year: | 1912 |
| Size: | 24 x 31 mm |
| Perforation: | line 11½ |
| Mintage: | 10,000 |
