Mark Twain said that "Whenever you find yourself on the side of the majority, it is time to pause and reflect". Wise words, as majorities are frequently wrong.
Having said this, I will also say that the majority who consider the "white dial Mark 11" an after market modification, presented convincing evidence those dials are not, or can't be, by IWC or the RAF, while you just provide as "evidence" the white dials are authentic, that other brands also have white dials, or of circumstances when "experts" were wrong, also on other brands. You have not provided one single evidence that the "white dial Mark 11" is nothing but what it is - a fraud.
As far as I am concerned, the issue merits no further discussion.
With all due respect Clep i've witnessed your dial evaluations in this very thread and seeing that vintage watches cost monies i tend to lean heavilly on me own eyes. Anyone out there with enough experience to put thier own monies into a few thousand vintage wristwatches, or perhaps even half a thousand in the same sitting will know the dials in question were not painted in the mid 80;s.....without the use of magnification. It is'nt for me to provide evidence of anything, afterall if it's good enough for Andrew to keep stum with regard to what legends inside of Schaffhausen have to say about Gentas contributions... then keeping stum is the new dance.
You might find at least the black twin to the WD pic'd in a book from '83, but of course the second-hand dealer could have got his '84 dates wrong.
Have you anything at all to add to why the dials in question are coated?