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1991 'DOGS -PAINTINGS BY GEORGE STUBBS' ISSUE
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1991 'GREETINGS - GOOD LUCK' ISSUE
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1991 'SCIENTIFIC ACHIEVEMENTS' ISSUE
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1991 'GREETINGS (1ST) - SMILES' ISSUE
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1991 'EUROPA -EUROPE IN SPACE' ISSUE
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1991 'WORLD STUDENT GAMES' ISSUE
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1991 '9TH ROSES WORLD CONGRESS' ISSUE
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1991 '150TH ANN OF DINOSAUR IDENTIFICATION' ISSUE
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1991 '200TH ANN OF ORDNANCE SURVEY' ISSUE
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1991 'CHRISTMAS' ISSUE
