Launched in 2025, the Vacheron Constantin Traditionnelle Perpetual Calendar Ultra-Thin 4300T/000R-H107 features a luxurious pink-gold case, echoing the classic design of the 36.5 mm Perpetual Calendar Ultra-Thin. Its visual elements and structure hark back to the reference 43031, a perpetual calendar model that made its debut in 1983. Crafted from 18K 5N pink gold, the case has a diameter of 36.5 mm and a thickness of 8.43 mm, complemented by a sapphire crystal case back and a water resistance of up to 30 meters.

The watch boasts a silver-tone opaline dial adorned with baton hour markers and elegant faceted Dauphine hands, all in 18K 5N pink gold. The perpetual calendar showcases the day, date, and month through three individual registers, while the 48-month scale at 12 o'clock indicates the leap year. Meanwhile, moon phase information is displayed at the 6 o'clock position against a striking dark blue backdrop. At its heart lies the ultra-thin calibre 1120 QP, an automatic movement featuring both perpetual calendar and moon phase functions, operating at a frequency of 2.75 Hz and offering around 40 hours of power reserve. Completing the watch is a dark blue Mississippiensis alligator leather strap, finished with tone-on-tone stitching and an 18K 5N pink-gold pin buckle, carrying the prestigious Geneva Seal.