Thank you Matteo, you did a tremendous work on those dials.
To me there are clearly two types, which are very different. The first 2 examples, the one we describe in the book, are soleil dial and more blue. Their short indexes, as well as distant Ts probably mean they were produced later (end 60´s?) and correspond to tests that have not resulted in mass production (as racing dials). Dials of the second type have all age characteristics of their corresponding classical black and were likely produced at the same time. But the difference of position of the indexes show they are not just standard dials that turned grey-blue, but are really different. As we can find them from 2998 to 145.012 means probably they were not test dials, but no explanation of their origin so far.
Speedmaster world is full of surprises
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