Vintage  Mid 20th Century Ogilvy Microscope Lamp For Repair. I would assume this is 1950s. It reads "GS" and is well made. It measures 30cm  x 25cm. It weighs 1.6Kg.  It does not work.  NB it needs to be rewired. I wouldn't have thought it would be too difficult to sort out.  Body has minor marks. It could do with a clean.