Nicaragua
Visar nu: Nicaragua - Postfrimärken (1862 - 2021) - 1 frimärken.
1971
Airmail - Physical Laws and Mathematical Formulas
15. maj WM: Inga Gravyr: De La Rue. Perforering: 13
![[Airmail - Physical Laws and Mathematical Formulas, Typ AIL]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Nicaragua/Postage-stamps/AIL-s.jpg)
![[Airmail - Physical Laws and Mathematical Formulas, Typ AIM]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Nicaragua/Postage-stamps/AIM-s.jpg)
![[Airmail - Physical Laws and Mathematical Formulas, Typ AIN]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Nicaragua/Postage-stamps/AIN-s.jpg)
![[Airmail - Physical Laws and Mathematical Formulas, Typ AIO]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Nicaragua/Postage-stamps/AIO-s.jpg)
![[Airmail - Physical Laws and Mathematical Formulas, Typ AIP]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Nicaragua/Postage-stamps/AIP-s.jpg)
| Nummer | Typ | D | Färg | Beskrivning |
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| 1668 | AIL | 25C | flerfärgad | Napier's Law, logarithms | 0,27 | - | 0,27 | - | USD |
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| 1669 | AIM | 30C | flerfärgad | Pythagorean theorem | 0,27 | - | 0,27 | - | USD |
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| 1670 | AIN | 40C | flerfärgad | Boltzmann equation | 0,27 | - | 0,27 | - | USD |
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| 1671 | AIO | 1Cord | flerfärgad | de Broglie hypothesis | 0,81 | - | 0,27 | - | USD |
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| 1672 | AIP | 2Cord | flerfärgad | Archimedes’ principle | 1,08 | - | 0,81 | - | USD |
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