Thank you all for the input.
If I were to buy the watch I will definitely change the hands to a tritium set to match the tritium markers. That said, I shall always harbor a lingering suspicion that the dial or bezel may also be from a service set. Note that this watch is not equipped with a no date dial peculiar to some fat ladies but the dated one similar to the 16710. Really, there is no way to tell. Is there?
Watch collecting is emotional. As long as there is an element of negativity, rightfully or not, it is best not to pursue. Why spend money only to feel lousy? I have decided to let the watch go.
Talking about lume, I have an IWC mk12 which I bought new in the mid 90's. The tritium hands and dial (3,6,9, 12 markers) had for some time acquired a patina and are no longer luminous.
KT