Tonda Centum has a perpetual calendar and a precision moon phase, two Haute Horlogerie complications which are only very rarely associated due to their respective complexity. The dial shows the moon phase as a Roman Numeral in the upper circle while indicating the moon’s exact position in both the northern and southern hemispheres…(I felt the weekday and month complications were too small in the original.)
THE ORIGINAL:
CREDIT: Parmigiani.com