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D A Willetts: solargraph 1 (Original colours)
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D A Willetts: solargraph 1 (Reversed colours)
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D A Willetts: solargraph 2 (Original colours)
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D A Willetts: solargraph 2 (Reversed colours)
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D A Willetts: solargraph may 2015 1 month (positive)
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D A Willetts: solargraph may 2015 1 month (negative)
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D A Willetts: solargraph june 2015 to feb 2016