| Added by |
 Steve
|
| Face value | 18p |
| Catalog code (Michel) | GB-S 34 |
| Catalog code (Scott) | GB-S MH33 |
| Catalog code | Yvert et Tellier GB 986 Stanley Gibbons GB S44 Unificato GB 986 |
| Series | Machin |
| Stamp colour | Violet Blue |
| Watermark | None |
| Stamp use | Definitive stamp |
| Issue date | 08/04/1981 |
| Designer | Arnold Machin / Jeffrey Matthews |
| Paper type | phosphorised paper |
| Print technique | Offset lithography |
| Printed by | John Waddington Security Print Ltd. |
| Perforation | comb 13½ x 14 |
| Height | 24.00 mm |
| Width | 20.00 mm |
| Catalog prices | Used stamp $0.75 Unused stamp $1.00 |
