Parmigiani Fleurier, Tongda series, model: PFH227, Retrograde Perpetual calendar, 18K rose gold case, 42mm in diameter. The silver-gray Geneva patterned dial is exquisitely laid out. The core highlight is the retrograde perpetual calendar function: the arc-shaped scale on the outer ring is combined with the retrograde date hand, which instantly returns to zero at the end of the month, creating a visually dynamic effect. It integrates the display of day of the week and month with a moon phase window at 6 o 'clock. It can automatically identify large and small months as well as leap years, eliminating the need for frequent adjustments. It is a manifestation of the top complex functions in the watchmaking industry. The self-made self-winding movement, certified by an observatory, keeps accurate time. The rose gold rotor is finely polished, and the exquisite craftsmanship can be appreciated through the case back. Complete set