Τώρα εμφανίζεται Ουρουγουάη - Γραμματόσημα (1930 - 1939) - 14 Γραμματόσημα.
WM: Κανένα Σκάλισμα: Imprenta Nacional, Montevideo. Διάτρηση: 12½
![[Rio Negro Dam, τύπος IQ]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IQ-s.jpg)
![[Rio Negro Dam, τύπος IQ1]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IQ1-s.jpg)
![[Rio Negro Dam, τύπος IQ2]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IQ2-s.jpg)
![[Rio Negro Dam, τύπος IQ3]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IQ3-s.jpg)
WM: Κανένα Σκάλισμα: Imprenta Nacional, Montevideo. Διάτρηση: 12½
![[Airmail - Rio Negro Dam, τύπος IR]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR-s.jpg)
![[Airmail - Rio Negro Dam, τύπος IR1]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR1-s.jpg)
![[Airmail - Rio Negro Dam, τύπος IR2]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR2-s.jpg)
![[Airmail - Rio Negro Dam, τύπος IR3]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR3-s.jpg)
![[Airmail - Rio Negro Dam, τύπος IR4]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR4-s.jpg)
![[Airmail - Rio Negro Dam, τύπος IR5]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR5-s.jpg)
![[Airmail - Rio Negro Dam, τύπος IR6]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR6-s.jpg)
![[Airmail - Rio Negro Dam, τύπος IR7]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR7-s.jpg)
![[Airmail - Rio Negro Dam, τύπος IR8]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR8-s.jpg)
![[Airmail - Rio Negro Dam, τύπος IR9]](https://www.stampworld.com/media/catalogue/Uruguay/Postage-stamps/IR9-s.jpg)
| Νούμερο | Τύπος | D | Χρώμα | Περιγραφή |
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| 573 | IR | 8C | ΑΝΟΙΧΤΟ ΠΡΑΣΙΝΟ | (200.600) | 0,58 | - | 0,58 | - | USD |
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| 574 | IR1 | 20C | ΠΡΑΣΙΝΟ | (50.000) | 0,58 | 5,80 | 3,48 | - | USD |
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| 575 | IR2 | 20C | ΠΡΑΣΙΝΟ | (10.000) | 1,74 | - | 1,16 | - | USD |
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| 576 | IR3 | 62C | ΠΡΑΣΙΝΩΠΟ ΜΠΛΕ | (300.000) | 9,29 | - | 6,97 | - | USD |
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| 577 | IR4 | 68C | ΚΙΤΡΙΝΟ | (50.000) | 0,87 | - | 0,29 | - | USD |
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| 578 | IR5 | 68C | ΒΙΟΛΕΤΙ ΚΑΦΕ | (50.000) | 1,74 | - | 1,16 | - | USD |
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| 579 | IR6 | 75C | ΒΙΟΛΕΤΙ | (5.000) | 6,97 | - | 6,97 | - | USD |
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| 580 | IR7 | 1P | ΚΑΡΜΙΝΙΟ | (50.000) | 2,32 | - | 1,74 | - | USD |
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| 581 | IR8 | 1.38P | ΤΡΙΑΝΤΑΦΥΛΛΙ | (20.000) | 23,22 | - | 17,42 | - | USD |
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| 582 | IR9 | 3P | ΣΚΟΥΡΟ ΜΠΛΕ | (20.000) | 17,42 | - | 11,61 | - | USD |
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| 573‑582 | 64,73 | 5,80 | 51,38 | - | USD |
