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Amgueddfa Cymru – Museum Wales
Interior of Gurnos tinplate works. Site of hot mills looking south, showing sites of mill furnaces on left (east). Girders carried roll change gantry - just visible in the distance. Wooden steps in middle distance on left (not in situ) was for crossing over driveshafts and wobblers between pairs of mills. Narrow gauge rail tracks set into floor at right foreground were for roll trolleys and bars/sheets.