I don't know the model of this or even if the harp frame is correct for it. Probably is though as it fits perfectly and sort of looks right. The lamp is yet another variation of KD1 with an older type burner on a later tank. Another one I don't own but I took these pictures when I visited Alex Marack a year or so ago. ::Neil::
Hello Neil, the harp is correct for this lamp and i reckon that it was made between 1922 and 1927. I have attached a scan which shows this lamp, Jeff.
Jeff. Koool stuff. An image I had not seen before and confirms what I thought that the frame is correct. Nice all I need now is a model number for it. ::Neil::