Dr No[Moderator Omega - Wristscan]
37520
Right, as usual! . . .
[image credit: Dr No, Mar '08 / watch credit: mrsnak]
. . . the red trim ring at the outer edge of the hash marks appears missing in the revision, and of course, the calendar function is also a point of divergence, but other than that, Omega has done a bang-up job recreating the original.
One wonders at the potential for a Professional Mk II fitted with the venerable cal 1861 . . .