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Zac Carey from London W1 won last week's champagne, spotting the three Gustavs. Pictured were Gustave Eiffel's eponymous tower; Gustav Peichl's Austrian State Radio Studios; and Gustav Mahler. Answers to this week's puzzler by Monday am, please. Send a postcard (the more surreal the better) to AJ Astragal, 151 Rosebery Avenue, London EC1R 4GB.