Development of Working Tools 1978
Now showing: Portugal - Postage stamps - 1978 - Development of Working Tools - 7 stamps.
1978
Development of Working Tools
15. February WM: None Design: Serviços Artísticos dos CTT Engraving: Stampatore: Imprensa Nacional Casa da Moeda Perforation: 13½ x 13¾
![[Development of Working Tools, type XL]](https://www.stampworld.com/media/catalogue/Portugal/Postage-stamps/XL-s.jpg)
![[Development of Working Tools, type XM]](https://www.stampworld.com/media/catalogue/Portugal/Postage-stamps/XM-s.jpg)
![[Development of Working Tools, type XN]](https://www.stampworld.com/media/catalogue/Portugal/Postage-stamps/XN-s.jpg)
![[Development of Working Tools, type XO]](https://www.stampworld.com/media/catalogue/Portugal/Postage-stamps/XO-s.jpg)
![[Development of Working Tools, type XP]](https://www.stampworld.com/media/catalogue/Portugal/Postage-stamps/XP-s.jpg)
| No. | Type | D | Color | Description |
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| 1377 | XL | 4Esc | multicoloured | 0.26 | - | 0.26 | - | USD |
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| 1378 | XM | 5Esc | multicoloured | 0.26 | - | 0.26 | - | USD |
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| 1379 | XN | 6Esc | multicoloured | 0.26 | - | 0.26 | - | USD |
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| 1380 | XO | 7Esc | multicoloured | 0.26 | - | 0.26 | - | USD |
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| 1381 | XP | 20Esc | multicoloured | Normal Paper | 0.53 | - | 0.26 | - | USD |
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| 1381a* | XP1 | 20Esc | multicoloured | With Phosphor. | 5.27 | - | 0.79 | - | USD |
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| 1381b* | XP2 | 20Esc | multicoloured | Black missing | 12.65 | - | - | - | USD |
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| 1377‑1381 | Set (* Stamp not included in this set) | 1.57 | - | 1.30 | - | USD |
