...of the new Datograph is the most compelling improvement over the old for me. For a manual wind, 36-hour can become a chore very quickly. Otherwise, I also prefer the old face, with the big date and 2 sub-dial triangle matched symmetrically by the upside down triangle of roman indices of 2, 6 and 10 o'clock. The power reserve indicator is neither a plus or minus for me, though the extra 2mm is most welcomed.