Four Victorian cast iron industrial circular windows, in the style of Coalbrookdale iron works. Each window with segmented circular radiating window panes and stepped edges to retain the glass when fitted. With pivoting openers and a stepped lip (sealing lip) to help eliminate any draughts when closed, as shown in the images. They will pivot through approximate 65 degrees,circa 1870.Measuring: 48" across the flats and 2" thick.