This lamp is a model-12 four post hanging lamp with an original 620 shade. There are two variations of the 620 shade and you will find another listing for a 620 shade shown on the Aladdin hanging lamps web page. The shade shown here is the most common variety of the 620 which has the clear glass rim at the bottom of the shade. The other variety of the 620 shade is entirely painted and is the more rare shade. These two shades, even though they look quite different from each other, do share the same designation.