Sýni: Úrúgvæ - Venjuleg frímerki (1930 - 1939) - 14 frímerki.
WM: Ekkert Leturgröftur: Imprenta Nacional, Montevideo. Götun: 12½
![[Rio Negro Dam, tegund IQ]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IQ-s.jpg)
![[Rio Negro Dam, tegund IQ1]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IQ1-s.jpg)
![[Rio Negro Dam, tegund IQ2]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IQ2-s.jpg)
![[Rio Negro Dam, tegund IQ3]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IQ3-s.jpg)
WM: Ekkert Leturgröftur: Imprenta Nacional, Montevideo. Götun: 12½
![[Airmail - Rio Negro Dam, tegund IR]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR-s.jpg)
![[Airmail - Rio Negro Dam, tegund IR1]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR1-s.jpg)
![[Airmail - Rio Negro Dam, tegund IR2]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR2-s.jpg)
![[Airmail - Rio Negro Dam, tegund IR3]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR3-s.jpg)
![[Airmail - Rio Negro Dam, tegund IR4]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR4-s.jpg)
![[Airmail - Rio Negro Dam, tegund IR5]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR5-s.jpg)
![[Airmail - Rio Negro Dam, tegund IR6]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR6-s.jpg)
![[Airmail - Rio Negro Dam, tegund IR7]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR7-s.jpg)
![[Airmail - Rio Negro Dam, tegund IR8]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR8-s.jpg)
![[Airmail - Rio Negro Dam, tegund IR9]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR9-s.jpg)
| Númer | Tegund | D | Litur | Lýsing |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 573 | IR | 8C | ljósgrænt | (200.600) | 0,58 | - | 0,58 | - | USD |
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| 574 | IR1 | 20C | grænn | (50.000) | 0,58 | 5,78 | 3,46 | - | USD |
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| 575 | IR2 | 20C | grænn | (10.000) | 1,73 | - | 1,16 | - | USD |
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| 576 | IR3 | 62C | grænblár | (300.000) | 9,24 | - | 6,93 | - | USD |
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| 577 | IR4 | 68C | gulur | (50.000) | 0,87 | - | 0,29 | - | USD |
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| 578 | IR5 | 68C | fjólublár brúnn | (50.000) | 1,73 | - | 1,16 | - | USD |
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| 579 | IR6 | 75C | fjólublár | (5.000) | 6,93 | - | 6,93 | - | USD |
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| 580 | IR7 | 1P | fagurrautt | (50.000) | 2,31 | - | 1,73 | - | USD |
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| 581 | IR8 | 1.38P | rósóttur | (20.000) | 23,10 | - | 17,32 | - | USD |
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| 582 | IR9 | 3P | dökkblátt | (20.000) | 17,32 | - | 11,55 | - | USD |
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| 573‑582 | 64,39 | 5,78 | 51,11 | - | USD |
