[locknut]

Hi Michael I have a Marshall traction engine 51037 of 1908 The measurements of the gauges are as follows mounting flange is 3-3/8 inch with 1/2 holes The body of the gauge is 1 inch 9/16 square The mounting face of the flange to the centre of the glass is 3-3/4 inch I only have bits I will need right & left hand sets I have the stalks Regards Mal