I would have to agree with Chris, Jesse. None of the markings I have ever seen on 19-Sets over the last 40 plus years have ever showed any signs of the classic radium paint brown out effect with age. I have seen one meter with a brown face but it showed other signs indicating a likely cause for it to brown out was exposure to moisture more than anything being radioactive.
If you want to see what radium paint looks like when it ages out, its shows up very often in military pocket watches. The vast majority out there will have browned out radium paint on their dials. Not certain what causes the effect but I am suspicious UV Radiation from exposure to daylight could be a big factor. I have seen military pocket watches 70+ years old stored in their original boxes and they look like the day they were made.
David
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