Silkworm Research 1991
Now showing: North Korea - Postage stamps - 1991 - Silkworm Research - 6 stamps.
1991
Silkworm Research
27. March WM: None Perforation: 12ΒΌ
![[Silkworm Research, type ]](https://www.stampworld.com/media/catalogue/North-Korea/Postage-stamps/3304-b.jpg)
| No. | Type | D | Color | Description |
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| 3304 | DMO | 10Ch | multicoloured | Dr. Kye Ung Sang | 0.26 | - | 0.26 | - | USD |
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| 3305 | DMP | 20Ch | multicoloured | Antheraea pernyi | 0.52 | - | 0.26 | - | USD |
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| 3306 | DMQ | 30Ch | multicoloured | Attacus ricini | 0.52 | - | 0.26 | - | USD |
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| 3307 | DMR | 40Ch | multicoloured | Antheraea yamamai | 0.78 | - | 0.26 | - | USD |
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| 3308 | DMS | 50Ch | multicoloured | Bombyx mori | 0.78 | - | 0.52 | - | USD |
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| 3309 | DMT | 60Ch | multicoloured | Aetias artemis | 1.04 | - | 0.52 | - | USD |
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| 3304‑3309 | Minisheet | 6.22 | - | 2.59 | - | USD | |||||||||||
| 3304‑3309 | 3.90 | - | 2.08 | - | USD |
