25th Anniv. of Research Institue of Posts and Telecommunicat
3,500 ₫ 1991
Vietnam
Individual stamp from souvenir sheet.
Not listed separately by Sg or Sn
Not listed separately by Sg or Sn
| Country: | Vietnam |
| Type: | Postage stamps |
| Series: | Research Institue of Posts and Telecommunications |
| Nominal: | 3,500 ₫ |
| Year: | 1991 |
| Perforation: | 13 |
Research Institue of Posts and Telecommunications
 Telecommunications Network's Digitalization |  25th Anniv. of Research Institue of Posts and Telecommunicat |