American Inventors 1983
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1983
American Inventors
21. september VM: Ingen Perforeringer: 11
![[American Inventors, type ]](https://www.stampworld.com/media/catalogue/United-States/Postage-stamps/1805-b.jpg)
| Nr. | Type | D | Farve | Beskrivelse |
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| 1805 | BDO | 20C | Orange/Sort | Charles Steinmetz, 1865-1923, and Curve on Graph | (48 mill) | 0,28 | - | 0,28 | 0,85 | USD |
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| 1806 | BDP | 20C | Orange/Sort | (48 mill) | 0,28 | - | 0,28 | 0,85 | USD |
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| 1807 | BDQ | 20C | Orange/Sort | (48 mill) | 0,28 | - | 0,28 | 0,85 | USD |
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| 1808 | BDR | 20C | Orange/Sort | (48 mill) | 0,28 | - | 0,28 | 0,85 | USD |
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| 1805‑1808 | Block of 4 | 1,70 | - | 1,14 | 3,41 | USD | |||||||||||
| 1805‑1808 | 1,12 | - | 1,12 | 3,40 | USD |
