Sedaj prikazano: Osrednje območje - Znamke pošte z dolgovi (1920 - 1929) - 13 znamke.
1. julij WM: Nič Perforacija: 11
![[US Postage Due Stamps Overprinted, tip D]](https://www.stampworld.com/media/catalogue/Canal-Zone/Postage-due-stamps/D-s.jpg)
![[US Postage Due Stamps Overprinted, tip D3]](https://www.stampworld.com/media/catalogue/Canal-Zone/Postage-due-stamps/D3-s.jpg)
| Št. | Tip | D | Barva | Opis |
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| 11 | D | 1C | karmin rdeča | "A" with flat top | - | 83,34 | 26,04 | - | USD |
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| 11A* | D1 | 1C | karmin rdeča | - | 8,33 | 2,60 | - | USD |
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| 12 | D2 | 2C | rjavkasto karmin | "A" with flat top | - | 52,09 | 8,33 | - | USD |
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| 12A* | D3 | 2C | rjavkasto karmin | - | 12,50 | 4,17 | - | USD |
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| 13 | D4 | 10C | rjavkasto karmin | "A" with flat top | - | 208 | 52,09 | - | USD |
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| 13A* | D5 | 10C | rjavkasto karmin | - | 156 | 15,63 | - | USD |
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| 11‑13 | Serija (* Stamp not included in this set) | - | 343 | 86,46 | - | USD |
februar WM: Nič Perforacija: 11
![[Panama Canal Zone Postage Stamps Overprinted "POSTAGE DUE", tip E]](https://www.stampworld.com/media/catalogue/Canal-Zone/Postage-due-stamps/E-s.jpg)
![[Panama Canal Zone Postage Stamps Overprinted "POSTAGE DUE", tip E1]](https://www.stampworld.com/media/catalogue/Canal-Zone/Postage-due-stamps/E1-s.jpg)
![[Panama Canal Zone Postage Stamps Overprinted "POSTAGE DUE", tip E2]](https://www.stampworld.com/media/catalogue/Canal-Zone/Postage-due-stamps/E2-s.jpg)
16. december WM: Nič Perforacija: 11
![[Panama Canal Zone Postage Stamp Surcharged, tip F]](https://www.stampworld.com/media/catalogue/Canal-Zone/Postage-due-stamps/F-s.jpg)
![[Panama Canal Zone Postage Stamp Surcharged, tip F1]](https://www.stampworld.com/media/catalogue/Canal-Zone/Postage-due-stamps/F1-s.jpg)
![[Panama Canal Zone Postage Stamp Surcharged, tip F2]](https://www.stampworld.com/media/catalogue/Canal-Zone/Postage-due-stamps/F2-s.jpg)
![[Panama Canal Zone Postage Stamp Surcharged, tip F3]](https://www.stampworld.com/media/catalogue/Canal-Zone/Postage-due-stamps/F3-s.jpg)
