Pro Juventute - The 250th Anniversary of Leonhard Euler - Insects 1957
Now showing: Switzerland - Postage stamps - 1957 - Pro Juventute - The 250th Anniversary of Leonhard Euler - Insects - 5 stamps.
1957
Pro Juventute - The 250th Anniversary of Leonhard Euler - Insects
30. November WM: None Sheetsize: 50 Engraving: Courvoisier. S.A. Perforation: 11¾
![[Pro Juventute - The 250th Anniversary of Leonhard Euler - Insects, type YQ]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Switzerland/Postage-stamps/YQ-s.jpg)
![[Pro Juventute - The 250th Anniversary of Leonhard Euler - Insects, type YR]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Switzerland/Postage-stamps/YR-s.jpg)
![[Pro Juventute - The 250th Anniversary of Leonhard Euler - Insects, type YS]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Switzerland/Postage-stamps/YS-s.jpg)
![[Pro Juventute - The 250th Anniversary of Leonhard Euler - Insects, type YT]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Switzerland/Postage-stamps/YT-s.jpg)
![[Pro Juventute - The 250th Anniversary of Leonhard Euler - Insects, type YU]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Switzerland/Postage-stamps/YU-s.jpg)
| No. | Type | D | Color | Description |
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| 642 | YQ | 5+5 (C) | multicoloured | Leonhard Euler | (10550000) | 0.54 | - | 0.27 | - | USD |
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| 643 | YR | 10+10 (C) | multicoloured | Colias croceus | (8 mill) | 0.27 | - | 0.54 | - | USD |
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| 644 | YS | 20+10 (C) | multicoloured | Abraxas grossulariata | (5780000) | 0.54 | - | 0.54 | - | USD |
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| 645 | YT | 30+10 (C) | multicoloured | Cetonia aurata | (1640000) | 2.71 | - | 5.41 | - | USD |
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| 646 | YU | 40+10 (C) | multicoloured | Catocala nupta | (2 mill) | 2.16 | - | 4.33 | - | USD |
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| 642‑646 | 6.22 | - | 11.09 | - | USD |
