Sýni: Sviss - ILO (1923 - 1929) - 7 frímerki.
![[Switzerland Postage Stamps of 1924-1928 Overprinted "S.d.N - Bureau - international - du Travail", tegund C]](https://www.stampworld.com/media/catalogue/Switzerland/ILO/C-s.jpg)
![[Switzerland Postage Stamps of 1924-1928 Overprinted "S.d.N - Bureau - international - du Travail", tegund C1]](https://www.stampworld.com/media/catalogue/Switzerland/ILO/C1-s.jpg)
![[Switzerland Postage Stamps of 1924-1928 Overprinted "S.d.N - Bureau - international - du Travail", tegund C2]](https://www.stampworld.com/media/catalogue/Switzerland/ILO/C2-s.jpg)
![[Switzerland Postage Stamps of 1924-1928 Overprinted "S.d.N - Bureau - international - du Travail", tegund C3]](https://www.stampworld.com/media/catalogue/Switzerland/ILO/C3-s.jpg)
![[Switzerland Postage Stamps of 1924-1928 Overprinted "S.d.N - Bureau - international - du Travail", tegund C4]](https://www.stampworld.com/media/catalogue/Switzerland/ILO/C4-s.jpg)
![[Switzerland Postage Stamps of 1924-1928 Overprinted "S.d.N - Bureau - international - du Travail", tegund C5]](https://www.stampworld.com/media/catalogue/Switzerland/ILO/C5-s.jpg)
![[Switzerland Postage Stamps of 1924-1928 Overprinted "S.d.N - Bureau - international - du Travail", tegund C6]](https://www.stampworld.com/media/catalogue/Switzerland/ILO/C6-s.jpg)
| Númer | Tegund | D | Litur | Lýsing |
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| 25 | C | 2½(C) | brúnleitur ólífu | 353 | - | 0,59 | - | USD |
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| 26 | C1 | 3(C) | fjólublár blár | (95.000) | 589 | - | 1,77 | - | USD |
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| 27 | C2 | 7½(C) | grænn | (600.000) | 353 | - | 0,59 | - | USD |
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| 28 | C3 | 10(C) | blágrænn | 353 | - | 0,88 | - | USD |
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| 29 | C4 | 15(C) | brúnleitur fagurrauður | 353 | - | 1,77 | - | USD |
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| 30 | C5 | 5Fr | blár | 589 | - | 94,34 | - | USD |
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| 31 | C6 | 10Fr | grágrænn | (8.000) | 589 | - | 147 | - | USD |
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| 25‑31 | 3.183 | - | 247 | - | USD |
