Τώρα εμφανίζεται Βολιβία - Γραμματόσημα (1920 - 1929) - 7 Γραμματόσημα.
1924
Airmail - Establishment of the National Aviation School
Δεκέμβριος WM: Κανένα Σκάλισμα: Perkins, Bacon & Co. Διάτρηση: 14
![[Airmail - Establishment of the National Aviation School, τύπος AV]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/AV-s.jpg)
![[Airmail - Establishment of the National Aviation School, τύπος AV1]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/AV1-s.jpg)
![[Airmail - Establishment of the National Aviation School, τύπος AV2]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/AV2-s.jpg)
![[Airmail - Establishment of the National Aviation School, τύπος AV3]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/AV3-s.jpg)
![[Airmail - Establishment of the National Aviation School, τύπος AW]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/AW-s.jpg)
![[Airmail - Establishment of the National Aviation School, τύπος AW1]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/AW1-s.jpg)
![[Airmail - Establishment of the National Aviation School, τύπος AW2]](https://www.stampworld.com/media/catalogue/Bolivia/Postage-stamps/AW2-s.jpg)
| Νούμερο | Τύπος | D | Χρώμα | Περιγραφή |
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| 142 | AV | 10C | ΚΟΚΚΙΝΩΠΟ ΠΟΡΤΟΚΑΛΙ/ΜΑΥΡΟ | (150.000) | - | 0,58 | 0,58 | - | USD |
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| 143 | AV1 | 15C | ΚΑΡΜΙΝΙΟ/ΜΑΥΡΟ | (140.000) | - | 1,75 | 1,16 | - | USD |
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| 144 | AV2 | 25C | ΜΠΛΕ/ΜΑΥΡΟ | (42.000) | - | 0,87 | 0,58 | - | USD |
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| 145 | AV3 | 50C | ΠΟΡΤΟΚΑΛΙ ΚΙΤΡΙΝΟ/ΜΑΥΡΟ | (21.500) | - | 9,32 | 4,66 | - | USD |
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| 146 | AW | 1B | ΚΟΚΚΙΝΩΠΟ ΚΑΦΕ/ΜΑΥΡΟ | (48.000) | - | 2,33 | 1,75 | - | USD |
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| 147 | AW1 | 2B | ΜΑΥΡΟ ΚΑΦΕ/ΜΑΥΡΟ | (20.000) | - | 17,47 | 9,32 | - | USD |
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| 148 | AW2 | 5B | ΒΙΟΛΕΤΙ/ΜΑΥΡΟ | (10.000) | - | 17,47 | 13,98 | - | USD |
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| 142‑148 | - | 49,79 | 32,03 | - | USD |
