Stamps of Thailand, International Letter Writing Week 1981 issue
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postage
1981, Oct 4 International Letter Writing Week 1981 issue - dwarf trees wmk. zigzag lines (Thailand) p. 13.5
| - | 75s | multi | Mai-hok-hian | |||
| - | 2b | multi | Mai-kam-ma-lo | |||
| - | 2.75b | multi | Mai khen | |||
| - | 5b | multi | ´Mai khabuan |
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