Sýni: Bólivía - Venjuleg frímerki (1950 - 1959) - 10 frímerki.
9. október WM: Ekkert Leturgröftur: La Papelera S.A., La Paz. Götun: 13½
![[Development of Petroleum Industry, tegund HZ]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/HZ-s.jpg)
![[Development of Petroleum Industry, tegund HZ1]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/HZ1-s.jpg)
![[Development of Petroleum Industry, tegund HZ2]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/HZ2-s.jpg)
![[Development of Petroleum Industry, tegund HZ3]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/HZ3-s.jpg)
![[Development of Petroleum Industry, tegund HZ4]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/HZ4-s.jpg)
| Númer | Tegund | D | Litur | Lýsing |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 549 | HZ | 10B | sælitaður/ljósblátt | (2.000.000) | 0,28 | - | 0,28 | - | USD |
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| 550 | HZ1 | 35B | fagurrautt/gulleitur | (2.000.000) | 0,28 | - | 0,28 | - | USD |
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| 551 | HZ2 | 40B | grænn/ljósgrænt | (1.000.000) | 0,28 | - | 0,28 | - | USD |
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| 552 | HZ3 | 50B | fjólublátt/rósóttur | (1.000.000) | 0,56 | - | 0,28 | - | USD |
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| 553 | HZ4 | 80B | brúnt/brúnleitt gult | (1.000.000) | 0,83 | - | 0,28 | - | USD |
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| 549‑553 | 2,23 | - | 1,40 | - | USD |
9. október WM: Ekkert Leturgröftur: Litografias Unidas, La Paz. Götun: 13½
![[Airmail - Development of Petroleum Industry, tegund IA]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/IA-s.jpg)
![[Airmail - Development of Petroleum Industry, tegund IA1]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/IA1-s.jpg)
![[Airmail - Development of Petroleum Industry, tegund IA2]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/IA2-s.jpg)
![[Airmail - Development of Petroleum Industry, tegund IA3]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/IA3-s.jpg)
![[Airmail - Development of Petroleum Industry, tegund IA4]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/IA4-s.jpg)
| Númer | Tegund | D | Litur | Lýsing |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 554 | IA | 55B | grænblár/ljósblátt | (1.671.200) | 0,28 | - | 0,28 | - | USD |
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| 555 | IA1 | 70B | dökk grár/blágrár | (1.300.000) | 0,56 | - | 0,28 | - | USD |
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| 556 | IA2 | 90B | dökk grænn/ljósgrænt | (1.300.000) | 0,83 | - | 0,28 | - | USD |
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| 557 | IA3 | 500B | fjólublár rósóttur/marglitað | (250.000) | 3,33 | - | 0,83 | - | USD |
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| 558 | IA4 | 1000B | dökk brúnt/brúnleitt gult | (80.000) | 5,55 | - | 1,67 | - | USD |
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| 554‑558 | 10,55 | - | 3,34 | - | USD |
