Is the way the numbering on the bezel is arranged.
With the Zenith, and all the older daytonas, the tachymeter numbers all faced the same direction. Now, I guess ever since the bezel became ceramic, the numbers have been rotated around the bezel. I find it very hard to describe, but I am sure that you know what I mean!!
I much prefer the older way of displaying the numerals, and every time I see the new daytonas with ceramic bezels, it just bugs the hell out of me!!!
Maybe it is just me!!
Because of this, I think I would go for the black dial - even though I love the old Zenith 16520s, I don't feel the comparison between the two, as I can't stop looking at the tachy numbering alignment!!
Ah, such obsessions!
Cheers, Imran