Switzerland
Overprinted "Industrielle Kriegswirtschaft"
| Country: | Switzerland |
| Type: | Postage stamps |
| Series: | War Board of Trade |
| Nominal: | 20 Ct. |
| Year: | 1918 |
| Perforation: | comb 11¾ |
| Mintage: | 17,000 |
War Board of Trade
