Queen Elizabeth II Stamps 1991 Scientific Achievements 
| 268 | 
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Stamps are for illustration purposes only  |  | SG1546 22p Multicoloured | SG1547 22p Multicoloured |
 |  | SG1548 31p Multicoloured | SG1549 37p Multicoloured |
| Cat Ref | Stamp Description | Mint Value | Used Value | Price Guide | | SG1546 | 22p Multicoloured | £0.60 | £0.50 | | | SG1547 | 22p Multicoloured | £0.60 | £0.50 | | | SG1548 | 31p Multicoloured | £1.20 | £1.50 | | | SG1549 | 37p Multicoloured | £1.35 | £1.75 | |
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