Nicaragua
Now showing: Nicaragua - Postage stamps (1862 - 2021) - 1 stamps.
1971
Airmail - Physical Laws and Mathematical Formulas
15. May WM: None Engraving: De La Rue. Perforation: 13
No. | Type | D | Color | Description | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1668 | AIL | 25C | multicoloured | Napier's Law, logarithms | 0.28 | - | 0.28 | - | USD | ||||||||
1669 | AIM | 30C | multicoloured | Pythagorean theorem | 0.28 | - | 0.28 | - | USD | ||||||||
1670 | AIN | 40C | multicoloured | Boltzmann equation | 0.28 | - | 0.28 | - | USD | ||||||||
1671 | AIO | 1Cord | multicoloured | de Broglie hypothesis | 0.84 | - | 0.28 | - | USD | ||||||||
1672 | AIP | 2Cord | multicoloured | Archimedes’ principle | 1.12 | - | 0.84 | - | USD |