Hey Owlsden, I have been over the frames with an eye loup, and no markings anywhere, I checked where you would find M Sharpz markings, and there is nothing under the paintwork...I believe the paintwork is genuine, as there is years of muck on the frame, and the paint is the same colour underneath the muck...I don't want to clean the paint in case they are first gen machines...The state of the coils, the solder on the lugs all point to an early machine...I have came across the contact screws before on 1985-90 Sharpz machines..I believe at one time both M Sharpz and M Bee were in the same camp, hence the similarities...The M Bee lightening frame (I called it a Sting earlier, my mistake,) is almost identical to the Linograph....The only clue I have between the 2 machines I have is the Lightening/Linograph framed machine is thicker than the Dial framed one..In fact is is identical to the thickness of M Sharpz frame sizes..