The KG is a prefix to the actual model name which is a number. I used to own a KG381 which was only one of many frame models which started with KG and finished with some other 3 digit number. My KG381 is a frame built with shaped carbon fibre tubes bonded into aluminum lugs. The KG386 frame model sold at about the same time was a monocoque carbon fiber frame. There were numerous other Look frames over the years that shared the KG prefix