Vietnam
| Country: | Vietnam |
| Type: | Postage stamps |
| Series: | Hydroelectric power stations |
| Nominal: | 3,000 ₫ |
| Year: | 1988 |
| Size: | 46 x 31 mm |
| Perforation: | 13 |
Hydroelectric power stations
 Tri An Hydroelectric Plant 1.5$ |  Hoa Binh Hydroelectric Plant |