Vacheron Constantin Traditionnelle Complete Calendar Watch, model 4010T000R‑B344B740B345

Case diameter 41mm, thickness 13.7mm. Stepped round case and lugs, grooved case‑back with polished finishing. Track‑style minute scale, teardrop‑shaped hands. Symmetric week and month windows on both sides of dial. Peripheral date ring indicated by elegant black crescent‑shaped hand. Moon‑phase display at 6 o’clock. Citizen‑9015‑based self‑developed 2460 automatic‑winding movement.