Dr No[Moderator Omega - Wristscan]
37614
When it comes to white dial Speedmasters . . .
. . . (and there have been a few), the ultimate would be the white gold 25th anniversary moon landing model issued in '94 . . .
. . . with the only chronometer rated movement (cal 864) ever fitted to a Professional.
I had an opportunity to acquire one (on the white gold bracelet, no less) eight years ago; it would've been a keeper had I made the sacrifice back then.