Vietnam
An issue date of 1986-05-12 is known from Vietnamese first day covers.
| Country: | Vietnam |
| Type: | Postage stamps |
| Series: | “EXPO'86” World fair Vancouver (Historic Aircraft) |
| Nominal: | 5 ₫ |
| Year: | 1986 |
| Size: | 46 x 31 mm |
| Perforation: | 13 |
“EXPO'86” World fair Vancouver (Historic Aircraft)
 Hawker Hart 0.09$ |  Curtiss JN-4 Jenny 0.09$ |  PZL P-23 Karas 0.09$ |  Yakovlev Yak-11 0.09$ |
 Fokker Dr-1 triplane 0.11$ |  Boeing P-12, 1920 |  Nieuport-Delage 29C1, 1929 0.11$ |