Hello This lamp is from the 1930 Continental years. The catalog is shown with a light intensity between 300-400 HK. This lamp was there in the same design in 5 different sizes. The original glass is missing! Glasses with these dimensions are no longer available and must be made. In contrast to the 750 I noticed that the glass is in two lugs are attached to the screen. Then it is secured by a screw! Greetings Michael