25th Anniv. of Research Institue of Posts and Telecommunicat
3,500 ₫ 1991
В'єтнам
Individual stamp from souvenir sheet.
Not listed separately by Sg or Sn
Not listed separately by Sg or Sn
| Країна: | В'єтнам |
| Тип: | Поштові марки |
| Серія: | Research Institue of Posts and Telecommunications |
| Номінал: | 3,500 ₫ |
| Рік: | 1991 |
| Перфорація: | 13 |
Research Institue of Posts and Telecommunications
 Telecommunications Network's Digitalization |  25th Anniv. of Research Institue of Posts and Telecommunicat |