Vietnam
In SG the series is listed in year 1986, and Vietnamese first day covers with an issue date of 1986-10-20 are known.
| Country: | Vietnam |
| Type: | Postage stamps |
| Series: | Sailing ships |
| Nominal: | 5 ₫ |
| Year: | 1987 |
| Size: | 50 x 32 mm |
| Perforation: | comb 12½ x 12¼ |
Sailing ships
 Greek bireme 0.07$ |  Viking ship 0.07$ |  Cog (ship) 0.06$ |  Greek galley 0.14$ |
 Phoenician bireme 0.05$ |  Merchant ship from the Mediterranean 0.1$ |  Trireme |