Physical Laws and Mathematical Formulas 1971
Now showing: Nicaragua - Postage stamps - 1971 - Physical Laws and Mathematical Formulas - 5 stamps.
1971
Physical Laws and Mathematical Formulas
15. May WM: None Engraving: De La Rue. Perforation: 13
![[Physical Laws and Mathematical Formulas, type AIG]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Nicaragua/Postage-stamps/AIG-s.jpg)
![[Physical Laws and Mathematical Formulas, type AIH]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Nicaragua/Postage-stamps/AIH-s.jpg)
![[Physical Laws and Mathematical Formulas, type AII]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Nicaragua/Postage-stamps/AII-s.jpg)
![[Physical Laws and Mathematical Formulas, type AIJ]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Nicaragua/Postage-stamps/AIJ-s.jpg)
![[Physical Laws and Mathematical Formulas, type AIK]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Nicaragua/Postage-stamps/AIK-s.jpg)
| No. | Type | D | Color | Description |
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| 1663 | AIG | 10C | multicoloured | Using fingers to count | 0.27 | - | 0.27 | - | USD |
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| 1664 | AIH | 15C | multicoloured | Newton's Law of Gravity | 0.27 | - | 0.27 | - | USD |
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| 1665 | AII | 20C | multicoloured | Einstein's Theory | 0.27 | - | 0.27 | - | USD |
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| 1666 | AIJ | 1Cord | multicoloured | Tsiolkovsky Rocket Equation | 0.81 | - | 0.54 | - | USD |
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| 1667 | AIK | 2Cord | multicoloured | Maxwell's Law | 1.62 | - | 1.08 | - | USD |
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| 1663‑1667 | 3.24 | - | 2.43 | - | USD |
