Now showing: Uruguay - Postage stamps (1930 - 1939) - 14 stamps.
WM: None Engraving: Imprenta Nacional, Montevideo. Perforation: 12½
![[Rio Negro Dam, type IQ]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IQ-s.jpg)
![[Rio Negro Dam, type IQ1]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IQ1-s.jpg)
![[Rio Negro Dam, type IQ2]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IQ2-s.jpg)
![[Rio Negro Dam, type IQ3]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IQ3-s.jpg)
WM: None Engraving: Imprenta Nacional, Montevideo. Perforation: 12½
![[Airmail - Rio Negro Dam, type IR]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR-s.jpg)
![[Airmail - Rio Negro Dam, type IR1]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR1-s.jpg)
![[Airmail - Rio Negro Dam, type IR2]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR2-s.jpg)
![[Airmail - Rio Negro Dam, type IR3]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR3-s.jpg)
![[Airmail - Rio Negro Dam, type IR4]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR4-s.jpg)
![[Airmail - Rio Negro Dam, type IR5]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR5-s.jpg)
![[Airmail - Rio Negro Dam, type IR6]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR6-s.jpg)
![[Airmail - Rio Negro Dam, type IR7]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR7-s.jpg)
![[Airmail - Rio Negro Dam, type IR8]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR8-s.jpg)
![[Airmail - Rio Negro Dam, type IR9]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR9-s.jpg)
| No. | Type | D | Color | Description |
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| 573 | IR | 8C | light green | (200.600) | 0.59 | - | 0.59 | - | USD |
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| 574 | IR1 | 20C | green | (50.000) | 0.59 | 5.91 | 3.55 | - | USD |
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| 575 | IR2 | 20C | green | (10.000) | 1.77 | - | 1.18 | - | USD |
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| 576 | IR3 | 62C | greenish blue | (300.000) | 9.45 | - | 7.09 | - | USD |
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| 577 | IR4 | 68C | yellow | (50.000) | 0.89 | - | 0.30 | - | USD |
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| 578 | IR5 | 68C | violet brown | (50.000) | 1.77 | - | 1.18 | - | USD |
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| 579 | IR6 | 75C | violet | (5.000) | 7.09 | - | 7.09 | - | USD |
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| 580 | IR7 | 1P | carmine | (50.000) | 2.36 | - | 1.77 | - | USD |
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| 581 | IR8 | 1.38P | rose | (20.000) | 23.64 | - | 17.73 | - | USD |
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| 582 | IR9 | 3P | dark blue | (20.000) | 17.73 | - | 11.82 | - | USD |
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| 573‑582 | 65.88 | 5.91 | 52.30 | - | USD |
