Schweiz
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1957
Pro Juventute - The 250th Anniversary of Leonhard Euler - Insects
30. November Wz: Keine Bogengröße: 50 Gravieren: Courvoisier. S.A. Zähnung: 11¾
![[Pro Juventute - The 250th Anniversary of Leonhard Euler - Insects, Typ YQ]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Switzerland/Postage-stamps/YQ-s.jpg)
![[Pro Juventute - The 250th Anniversary of Leonhard Euler - Insects, Typ YR]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Switzerland/Postage-stamps/YR-s.jpg)
![[Pro Juventute - The 250th Anniversary of Leonhard Euler - Insects, Typ YS]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Switzerland/Postage-stamps/YS-s.jpg)
![[Pro Juventute - The 250th Anniversary of Leonhard Euler - Insects, Typ YT]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Switzerland/Postage-stamps/YT-s.jpg)
![[Pro Juventute - The 250th Anniversary of Leonhard Euler - Insects, Typ YU]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Switzerland/Postage-stamps/YU-s.jpg)
| Nummer | Typ | D | Farbe | Beschreibung |
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| 642 | YQ | 5+5 (C) | Mehrfarbig | Leonhard Euler | (10550000) | 0,55 | - | 0,27 | - | USD |
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| 643 | YR | 10+10 (C) | Mehrfarbig | Colias croceus | (8 mill) | 0,27 | - | 0,55 | - | USD |
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| 644 | YS | 20+10 (C) | Mehrfarbig | Abraxas grossulariata | (5780000) | 0,55 | - | 0,55 | - | USD |
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| 645 | YT | 30+10 (C) | Mehrfarbig | Cetonia aurata | (1640000) | 2,73 | - | 5,45 | - | USD |
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| 646 | YU | 40+10 (C) | Mehrfarbig | Catocala nupta | (2 mill) | 2,18 | - | 4,36 | - | USD |
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