| Added by |
 Alain Martineau
|
| Face value | ½ Pence |
| Catalog code (Michel) | GB 561C |
| Catalog code (Scott) | GB MH22 |
| Catalog code | Yvert et Tellier GB 605 Stanley Gibbons GB X841 AFA number GB 575 Unificato GB 605 |
| Series | Machin |
| Stamp colour | Greenish Blue |
| Watermark | None |
| Stamp use | Definitive stamp |
| Issue date | 15/02/1971 |
| Designer | Machin |
| Paper type | coated, two phosphor stripes (10.5 mm spacing) |
| Print technique | Photogravure |
| Printed by | Harrison & Sons Ltd |
| Perforation | comb 15 x 14 |
| Height | 24.00 mm |
| Width | 21.00 mm |
| Catalog prices | Used stamp $0.20 Unused stamp $0.20 |
