The 11th International Railway Congress, Madrid - Blue Control Numbers on Back 1930
Now showing: Spain - Postage stamps - 1930 - The 11th International Railway Congress, Madrid - Blue Control Numbers on Back - 13 stamps.
1930
The 11th International Railway Congress, Madrid - Blue Control Numbers on Back
10. May WM: None Engraving: F.N.M.T. Perforation: 14
![[The 11th International Railway Congress, Madrid - Blue Control Numbers on Back, type CK]](https://www.stampworld.com/media/catalogue/Spain/Postage-stamps/CK-s.jpg)
![[The 11th International Railway Congress, Madrid - Blue Control Numbers on Back, type CK1]](https://www.stampworld.com/media/catalogue/Spain/Postage-stamps/CK1-s.jpg)
![[The 11th International Railway Congress, Madrid - Blue Control Numbers on Back, type CK2]](https://www.stampworld.com/media/catalogue/Spain/Postage-stamps/CK2-s.jpg)
![[The 11th International Railway Congress, Madrid - Blue Control Numbers on Back, type CK3]](https://www.stampworld.com/media/catalogue/Spain/Postage-stamps/CK3-s.jpg)
![[The 11th International Railway Congress, Madrid - Blue Control Numbers on Back, type CK4]](https://www.stampworld.com/media/catalogue/Spain/Postage-stamps/CK4-s.jpg)
![[The 11th International Railway Congress, Madrid - Blue Control Numbers on Back, type CK5]](https://www.stampworld.com/media/catalogue/Spain/Postage-stamps/CK5-s.jpg)
![[The 11th International Railway Congress, Madrid - Blue Control Numbers on Back, type CK6]](https://www.stampworld.com/media/catalogue/Spain/Postage-stamps/CK6-s.jpg)
![[The 11th International Railway Congress, Madrid - Blue Control Numbers on Back, type CK7]](https://www.stampworld.com/media/catalogue/Spain/Postage-stamps/CK7-s.jpg)
![[The 11th International Railway Congress, Madrid - Blue Control Numbers on Back, type CK8]](https://www.stampworld.com/media/catalogue/Spain/Postage-stamps/CK8-s.jpg)
![[The 11th International Railway Congress, Madrid - Blue Control Numbers on Back, type CK9]](https://www.stampworld.com/media/catalogue/Spain/Postage-stamps/CK9-s.jpg)
![[The 11th International Railway Congress, Madrid - Blue Control Numbers on Back, type CK10]](https://www.stampworld.com/media/catalogue/Spain/Postage-stamps/CK10-s.jpg)
![[The 11th International Railway Congress, Madrid - Blue Control Numbers on Back, type CK11]](https://www.stampworld.com/media/catalogue/Spain/Postage-stamps/CK11-s.jpg)
![[The 11th International Railway Congress, Madrid - Blue Control Numbers on Back, type CK12]](https://www.stampworld.com/media/catalogue/Spain/Postage-stamps/CK12-s.jpg)
| No. | Type | D | Color | Description |
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| 436 | CK | 1C | bluish green | Without Control Numbers | (50000) | 1.06 | - | 0.53 | - | USD |
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| 437 | CK1 | 2C | olive green | Without Control Numbers | (50000) | 1.06 | - | 0.53 | - | USD |
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| 438 | CK2 | 5C | violet | (50000) | 1.06 | - | 0.53 | - | USD |
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| 439 | CK3 | 10C | green | (50000) | 1.06 | - | 0.53 | - | USD |
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| 440 | CK4 | 15C | bluish green | (50000) | 1.06 | - | 0.53 | - | USD |
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| 441 | CK5 | 20C | violet | (50000) | 1.06 | - | 0.53 | - | USD |
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| 442 | CK6 | 25C | rose | (75000) | 1.06 | - | 0.53 | - | USD |
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| 443 | CK7 | 30C | greyish brown | (40000) | 3.18 | - | 1.59 | - | USD |
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| 444 | CK8 | 40C | blue | (50000) | 3.18 | - | 1.59 | - | USD |
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| 445 | CK9 | 50C | yellowish brown | (30000) | 12.72 | - | 4.24 | - | USD |
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| 446 | CK10 | 1Pta | grey | (30000) | 12.72 | - | 5.30 | - | USD |
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| 447 | CK11 | 4Pta | purple rose | (15000) | 211 | - | 84.78 | - | USD |
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| 448 | CK12 | 10Pta | light blue | (10000) | 847 | - | 529 | - | USD |
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| 436‑448 | 1,098 | - | 631 | - | USD |
