It's totally legit..But at a price. The seller has been trying to sell this watch for the last 2 years. Maybe at the height of the craziness of 2005-2007 there would have been a line up for this watch regardless of price but in todays market?
A very interesting piece but with no provenance unfortunately. The Mk I dial is most excellent as is the watch generally.
If money was no object, I would certainely go fot it. But I'll stick with my 16800!!