Pro Juventute 1957
GOOGLE
60%
| Country: | Switzerland |
|---|---|
| Issue: | Pro Juventute: Insects, Leonhard von Euler |
| Date: | 1957-12-01 |
| Print: | Photogravure |
| Perforation: | comb 11¾ |
| Emission: | Semi-Postal |
| Format: | Booklet |
| Face Value: | 560+400 Swiss centime |
