Having reinstated one original feature, I have deviated from another another - instead of a clear indirect reading water gauge glass, I've put a red-line one in. This will make it far easier to see the water level.
More details - All the Ashton Valve Company gauges on the car have serial numbers; on the Steam Car Club of Great Britain Website there is a list of Ashton Gauge serial numbers and dates.
The Steam and Main Fuel Gauges date from 1913, and the Pilot Fuel gauge 1914 - the year Stanleys changed over to kerosene fuel with a separate petrol tank for pilot fuel.