Complete set, Vacheron Constantin, Wulu type, model: 4000E / 000R-B438, 40 discs, month, day of the week, date display, flawless • Diameter / Thickness: 40mm / 11.6mm, suitable for most wrists, no problem when worn formally • Waterproof performance: 30 meters, meeting the daily waterproof wearing requirements Core configuration and functions • Movement: Equipped with Vacheron Constantin's self-produced Cal.2460 QCL / 1 automatic winding movement, it has been certified by Geneva, featuring 27 jewels, a power reserve of 40 hours, and a frequency of 28,800 vibrations per hour • Core functions: Full calendar display (day / month window, pointer-style date) + precise moon phase, with a moon phase accuracy of up to 122 years that only needs to be adjusted once, and also supports stop-second function • Material: 18K 5N rose gold case / bezel / clasp, Mississippi alligator leather strap, lustrous silver dial with rose gold hour markers and hands • Design details: The lugs incorporate the brand's Maltese cross design elements. The transparent sapphire case back allows one to appreciate the polishing of the movement. The blue steel date hands and the moon phase dial create a visual echo The design integrates retro aesthetics with modern style, making it suitable for both business formal occasions and casual wear, with extremely strong style compatibility