Chemistry on stamps

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  Congo 2011 Nobel Prize Winners #2 perf sheetlet containing 4 values cto used £3.95
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  Congo 2011 Nobel Prize Winners #2 perf sheetlet containing 4 values unmounted mint £4.95
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  Congo 2011 Nobel Prize Winners #2 imperf sheetlet containing 4 values unmounted mint £6.95
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  Congo 2011 Nobel Prize Winners #1 imperf sheetlet containing 4 values unmounted mint £6.95
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  Congo 2011 Nobel Prize Winners #1 perf sheetlet containing 4 values cto used £3.95
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  Congo 2011 Nobel Prize Winners #1 perf sheetlet containing 4 values unmounted mint £4.95
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  France 1938 International Anti-Cancer Fund 1f75 + 50c unmounted mint, SG 617 £9.95
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  Mozambique 2010 Tribute to Marshall Warren Nirenberg (biochemist) perf sheetlet containing 4 values unmounted mint £12.95
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  St Thomas & Prince Islands 2009 Jewish Nobel Prize Winners perf sheetlet containing 4 values unmounted mint £9.75
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  Germany - West 1953 150th Birth Anniversary of Liebig (Chemist) cds used SG 1092 £14.00
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  Congo 2010 Nobel Prize Winners #1 perf sheetlet containing 6 values fine cto used £3.95
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  Congo 2010 Nobel Prize Winners #1 imperf sheetlet containing 6 values unmounted mint £8.25
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  Congo 2010 Nobel Prize Winners #1 perf sheetlet containing 6 values unmounted mint £5.25
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  Djibouti 2009 French Nobel Prize Winners for Chemistry imperf sheetlet containing 9 values unmounted mint £6.95
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  Djibouti 2009 French Nobel Prize Winners for Chemistry perf sheetlet containing 9 values unmounted mint £5.95
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  Djibouti 2009 French Nobel Prize Winners for Chemistry perf sheetlet containing 9 values fine cto used £4.25
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  Comoro Islands 2009 Nobel Prize Winners of 2008 perf sheetlet containing 6 values unmounted mint, Michel 2266-71 £8.95
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  Mozambique 2002 Louis Pasteur perf sheetlet containing 4 values unmounted mint (with Dogs) Yv 2080-83 £8.95
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  Gabon 2010-12 Greatest Personalities in World History - Dimitri Mendeleiev large perf s/sheet unmounted mint £12.50
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  Australia 1982 International Conference on Health Education 27c postal stationery envelope with special illustrated 'St Vincents Hospital Anniversary' cancellation £2.00
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  Australia 1982 International Conference on Health Education 27c postal stationery envelope with special illustrated 'Western Pacific Orthopaedic Association' cancellation £2.00
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  Australia 1982 International Conference on Health Education 27c postal stationery envelope with special illustrated Conference first day cancellation £2.00
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  Australia 1982 International Conference on Health Education 27c postal stationery envelope with special illustrated 'Epilepsy' first day cancellation £2.00
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  Australia 1982 International Conference on Health Education 27c postal stationery envelope with first day cancellation £2.00