Vacheron Constantin Automatic Mechanical Watch. Model: Overseas Perpetual Calendar Ultra-Thin. Case Size: 41mm. Material: Rose Gold Plated Steel (18k). Movement Type: Automatic Self-Winding. Caliber: Mastercraftable HC292 Allure I.C.. Complications Include: Perpetual Calendar, Annual Date Change, Leap Year Function (February), Moon Phase Display. Functions: Hours, Minutes, Seconds. Water Resistance: 3 bar / 30 meters. Case Finish: Brushed and Polished Rose Gold. Dial Color: Rose Gold-tone or Mother-of-Pearl finish depending on model variant. Bezel: Plain Sapphire Crystal. Clasp Type: Fold-over clasp with Push-Button Release (Antimagnetic). Strap/Skin Material: Brown Alligator Skin, Black Crocodile Skin, or Rose Gold Stainless Steel Bracelet strap. Luminous Function: Hands and markers are luminous coated for improved legibility in low light conditions.