V4 Upgrade Version Vacheron Constantin VC Heritage Series 85180 Watch .1. Case: The case size is 40MM x 9MM, featuring a perfectly round shape paired with a slightly curved lug design for a better fit on the wearer's wrist. Each finished case goes through MK's strict quality control to replicate the unique texture of the original.2. Movement: The 9015 movement and other components are meticulously decorated by MK watchmakers, with the automatic rotor plated in 18k gold to maximize the presentation of the original exquisite craftsmanship.3. Crystal: Both the front and back are fitted with sapphire glass, treated with anti-reflective coating.4. Strap: The strap is made of double-layer Italian calfskin, complemented by a Maltese cross pin buckle. Please recognize our exclusive quality.