Portugal
Stamp from souvenir sheet
| Country: | Portugal |
| Type: | Postage stamps |
| Series: | Halley's Comet |
| Nominal: | 100 $ |
| Year: | 1986 |
| Material: | Esmalte |
| Perforation: | comb 12 x 11¾ |
| Mintage: | 100,000 |