What a lovely pair, thanks for the write up!
One thing I've never quite figured out : the arabic numerals and hands of the black 4946, are they gold or silver? In this post they appear silver, but in some other posts of yours they appear gold. Is it the lighting?
What I have figured out (I think) is that the black 4945 has gold hands like Nilo's post shows.
All very confusing, but I daresay that whether gold or silver hands, the black dial is beautiful,esp at angles when the subdials turn a lighter shade of grey than the dial, yummy!