Viser nu Tjekkoslovakiet - Forfalden-porto frimærker (1919 - 1971) - 10 frimærker.
10. januar VM: Ingen Perforeringer: 14
![[Postage Stamp Overprinted in Blue, type I]](https://www.stampworld.com/media/catalogue/Czechoslovakia/Postage-due-stamps/I-s.jpg)
17. januar VM: Ingen Perforeringer: 14
![[Postage Stamps of 1920 Overprinted & Surcharged, type J]](https://www.stampworld.com/media/catalogue/Czechoslovakia/Postage-due-stamps/J-s.jpg)
![[Postage Stamps of 1920 Overprinted & Surcharged, type J1]](https://www.stampworld.com/media/catalogue/Czechoslovakia/Postage-due-stamps/J1-s.jpg)
![[Postage Stamps of 1920 Overprinted & Surcharged, type J3]](https://www.stampworld.com/media/catalogue/Czechoslovakia/Postage-due-stamps/J3-s.jpg)
Nr. | Type | D | Farve | Beskrivelse |
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48 | J | 40/185(H) | Orange | (7,25 mill) | 0,29 | - | 0,29 | - | USD |
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49 | J1 | 50/150(H) | Karmin | (3,93 mill) | 0,86 | - | 0,29 | - | USD |
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49A* | J2 | 50/150(H) | Karmin | Perf: 13¾ | (3,93 mill) | 34,23 | - | 4,56 | - | USD |
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50 | J3 | 60/185(H) | Orange | (3,05 mill) | 0,86 | - | 0,29 | - | USD |
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48‑50 | Sæt (* Mærke ikke inkluderet i dette sæt) | 2,01 | - | 0,87 | - | USD |
24. september VM: Ingen Perforeringer: 14
![[Postage Stamps of 1970 Overprinted & Surcharged, type K]](https://www.stampworld.com/media/catalogue/Czechoslovakia/Postage-due-stamps/K-s.jpg)
![[Postage Stamps of 1970 Overprinted & Surcharged, type K1]](https://www.stampworld.com/media/catalogue/Czechoslovakia/Postage-due-stamps/K1-s.jpg)
![[Postage Stamps of 1970 Overprinted & Surcharged, type K2]](https://www.stampworld.com/media/catalogue/Czechoslovakia/Postage-due-stamps/K2-s.jpg)
26. september VM: Ingen Perforeringer: Imperforated
![[No. 12 Surcharged, type L]](https://www.stampworld.com/media/catalogue/Czechoslovakia/Postage-due-stamps/L-s.jpg)