Well, the dial feet with regards to these dials is an interesting thing. Obviously, when you look at an MBW dial, the dial feet were once present, but removed as there is evidence of their former presence. That means they had to be sourced from somewhere, possibly for an aftermarket replacement on a genuine 1680 or 1665; if it were a new dial specifically for an MBW, either there would be no evidence of dial feet having been soldered on at one point, or they would be soldered on at ETA positions from the start.
Draw your own conclusions...