Now showing: Bolivia - Postage stamps (1867 - 2024) - 10 stamps.
9. October WM: None Engraving: La Papelera S.A., La Paz. Perforation: 13½
![[Development of Petroleum Industry, type HZ]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/HZ-s.jpg)
![[Development of Petroleum Industry, type HZ1]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/HZ1-s.jpg)
![[Development of Petroleum Industry, type HZ2]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/HZ2-s.jpg)
![[Development of Petroleum Industry, type HZ3]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/HZ3-s.jpg)
![[Development of Petroleum Industry, type HZ4]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/HZ4-s.jpg)
| No. | Type | D | Color | Description |
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| 549 | HZ | 10B | ultramarine/light blue | (2.000.000) | 0.29 | - | 0.29 | - | USD |
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| 550 | HZ1 | 35B | carmine/yellowish | (2.000.000) | 0.29 | - | 0.29 | - | USD |
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| 551 | HZ2 | 40B | green/light green | (1.000.000) | 0.29 | - | 0.29 | - | USD |
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| 552 | HZ3 | 50B | purple/rose | (1.000.000) | 0.58 | - | 0.29 | - | USD |
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| 553 | HZ4 | 80B | brown/brownish yellow | (1.000.000) | 0.87 | - | 0.29 | - | USD |
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| 549‑553 | 2.32 | - | 1.45 | - | USD |
9. October WM: None Engraving: Litografias Unidas, La Paz. Perforation: 13½
![[Airmail - Development of Petroleum Industry, type IA]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/IA-s.jpg)
![[Airmail - Development of Petroleum Industry, type IA1]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/IA1-s.jpg)
![[Airmail - Development of Petroleum Industry, type IA2]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/IA2-s.jpg)
![[Airmail - Development of Petroleum Industry, type IA3]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/IA3-s.jpg)
![[Airmail - Development of Petroleum Industry, type IA4]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/IA4-s.jpg)
| No. | Type | D | Color | Description |
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| 554 | IA | 55B | greenish blue/light blue | (1.671.200) | 0.29 | - | 0.29 | - | USD |
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| 555 | IA1 | 70B | dark grey/bluish grey | (1.300.000) | 0.58 | - | 0.29 | - | USD |
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| 556 | IA2 | 90B | dark green/light green | (1.300.000) | 0.87 | - | 0.29 | - | USD |
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| 557 | IA3 | 500B | purple rose/multicoloured | (250.000) | 3.49 | - | 0.87 | - | USD |
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| 558 | IA4 | 1000B | dark brown/brownish yellow | (80.000) | 5.81 | - | 1.74 | - | USD |
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| 554‑558 | 11.04 | - | 3.48 | - | USD |
