Inscription "Insufficiently prepaid Postage due." 1930
Now showing: Zanzibar - Postage due stamps - 1930 - Inscription "Insufficiently prepaid Postage due." - 6 stamps.
![[Inscription "Insufficiently prepaid Postage due.", type B]](https://www.stampworld.com/media/catalogue/Zanzibar/Postage-due-stamps/B-s.jpg)
![[Inscription "Insufficiently prepaid Postage due.", type B1]](https://www.stampworld.com/media/catalogue/Zanzibar/Postage-due-stamps/B1-s.jpg)
![[Inscription "Insufficiently prepaid Postage due.", type B2]](https://www.stampworld.com/media/catalogue/Zanzibar/Postage-due-stamps/B2-s.jpg)
![[Inscription "Insufficiently prepaid Postage due.", type B3]](https://www.stampworld.com/media/catalogue/Zanzibar/Postage-due-stamps/B3-s.jpg)
![[Inscription "Insufficiently prepaid Postage due.", type B4]](https://www.stampworld.com/media/catalogue/Zanzibar/Postage-due-stamps/B4-s.jpg)
![[Inscription "Insufficiently prepaid Postage due.", type B5]](https://www.stampworld.com/media/catalogue/Zanzibar/Postage-due-stamps/B5-s.jpg)
| No. | Type | D | Color | Description |
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| 15 | B | 2C | black | Orange paper | - | 15.65 | 31.29 | - | USD |
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| 16 | B1 | 3C | black | Rose paper | - | 4.17 | 62.59 | - | USD |
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| 17 | B2 | 6C | black | Yellow paper | - | 4.17 | 41.72 | - | USD |
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| 18 | B3 | 12C | black | Blue paper | - | 6.26 | 31.29 | - | USD |
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| 19 | B4 | 25C | black | Rose paper | - | 12.52 | 83.45 | - | USD |
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| 19A* | B5 | 25C | black | Violet paper | - | 15.65 | 62.59 | - | USD |
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| 15‑19 | Set (* Stamp not included in this set) | - | 42.77 | 250 | - | USD |
