Great Scientific Discoveries 1987
Τώρα εμφανίζεται Γρενάδα - Γραμματόσημα - 1987 - Great Scientific Discoveries - 4 Γραμματόσημα.
1987
Great Scientific Discoveries
9. Σεπτέμβριος WM: Κανένα Διάτρηση: 14
![[Great Scientific Discoveries, τύπος AYY]](https://www.stampworld.com/media/catalogue/Grenada/Postage-stamps/AYY-s.jpg)
![[Great Scientific Discoveries, τύπος AYZ]](https://www.stampworld.com/media/catalogue/Grenada/Postage-stamps/AYZ-s.jpg)
![[Great Scientific Discoveries, τύπος AZA]](https://www.stampworld.com/media/catalogue/Grenada/Postage-stamps/AZA-s.jpg)
![[Great Scientific Discoveries, τύπος AZB]](https://www.stampworld.com/media/catalogue/Grenada/Postage-stamps/AZB-s.jpg)
| Νούμερο | Τύπος | D | Χρώμα | Περιγραφή |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1713 | AYY | 50C | ΠΟΛΥΧΡΩΜΟΣ | Isaac Newton holding Apple (Law of Gravity) | 1,10 | - | 1,10 | - | USD |
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| 1714 | AYZ | 1.10$ | ΠΟΛΥΧΡΩΜΟΣ | John Jacob Berzelius and Symbols of Chemical Elements | 2,19 | - | 2,19 | - | USD |
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| 1715 | AZA | 2$ | ΠΟΛΥΧΡΩΜΟΣ | Robert Boyle (Law of Pressure and Volume) | 3,29 | - | 3,29 | - | USD |
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| 1716 | AZB | 3$ | ΠΟΛΥΧΡΩΜΟΣ | James Watt and Drawing of Steam Engine | 4,38 | - | 4,38 | - | USD |
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| 1713‑1716 | 10,96 | - | 10,96 | - | USD |
