United Kingdom
Rare. First Series. Derek Worboys Printing. Square backing. Anniversary of the first self adhesives of Sierra Leone. Authorized by Royal Mail for trial purposes and valid for postage.
| Country: | United Kingdom |
| Type: | Postage stamps |
| Series: | Machin 1974 Self-Adhesive Experimental Stamps |
| Nominal: | 1½ p |
| Year: | 1974 |
| Perforation: | Imperforate |
