Its a tough call. Generally speaking, these technical dials are not very common and I do think that would add a bit of a premium over a "run of the mill" Seamaster 600. Moreover, the white dial is a less common variant of these technical dials and that should also add a small premium. Having said that, it is difficult to say exactly by how much. In some models, a slight variation in the dial could mean a difference of 10-fold in price. Case in point, the 2990 Seamaster vs. the 2990 Ranchero. These are exactly the same watches, but the fact that there is Ranchero on the dial adds a big premium.
One thing you could do is put the watch on eBAY and see what the market says?
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