This is a Lovely Vintage Photax Interfit Aluminum Shade, Mount Attachment & Lamp Holder.  This Shade has an Opening Diameter of 34.5cm and Height of 21cm (Including Mount Attachment 28.5cm.  This has the attachment for a Tripod as well as a Bracket to slot onto a shelf.  It fits a Large Screw Fitting for a Bulb and is in working order.  As is expected with a Vintage item there are a few minor knocks on the shade which are shown in the photos.  The Flex has a Length of approx 4.5 Meters to the plug.