Thoughts on this 16520 white dial

I’ve been offered this complete set 16520. It’s a T serial (so potentially from 96) and while polished, is otherwise, in my view, in rather respectable condition (except for the slightly overpolished crown guards). The price is compelling but I have slight doubts about the period correctness of the dial. From all other variations I’ve seen from this era (i.e. T serial no and 1996), the dial should be a Mark 5 where the 5 lines of text are lower but this seems to feature the slightly later Mark 6 Tritium dials where the 5 lines of text are higher.

Any thoughts on this would be appreciated, along with any other aspects of the watch that might stand out.