Released in 2016, the Parmigiani Tonda Centum Perpetual Openworked is essentially the same as the regular model, however with a newly implemented tinted greyish blue transparent dial. Although many may argue that the present timepiece is not entirely “openworked”, the transparent dial essentially allows the wearer to appreciate the intricate mechanism behind the perpetual calendar timepiece. Encased in its traditional round-shaped case with streamlined teardrop lugs, the present timepiece definitely reflects the essence of Parmigiani. Although the tinted transparent greyish blue dial may reveal parts of the mechanism of the movement, the layout does not seem too clustered and maintains an excellent legibility of the indicators on the dial. A retrograde-style date indication is clearly positioned and indicated via an additional yellow crescent tipped hand, a leap year indication is presented in an aperture at 12 O’clock with two windows above the moon phases depict the day and month.

Encased in 18K white gold, the present timepiece is powered by self-winding in-house cal. PF333 with a central rotor in solid gold. Preserved in excellent overall condition, the present example is offered with its full set of accessories.