Stamps of Great Britain - Northern Ireland, 18p denom
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postage
1981, Apr 8 unwmk (no perf info)
| X | 18p | Queen Elizabeth II |
1986, Jan 7 1986 issue (no wmk info)
| X | 18p | ol | Queen Elizabeth II |
1991, Dec 3 1991 Northern Ireland issue unwmk
| X | 18p | brtgrn | Queen Elizabeth II |
1 to 3 of 3