Stopped by Christies to check out the Signature 1 up for auction (#2) and was surprised to find the dial differed from mine (#5).
The pic is terrible but you can just see that the earlier watch has a very very subtle circular graining to the center of the dial which isn't on the later watch which is super matte and the outer ring sunburst finish is slightly lighter in color and depth on the earlier watch.
Super nerdy and esoteric I know but it's a fun reminder that even the "same" watch isn't the same and with age every watch gets more unique over time.