V6 F Cartier 42mm blue balloon V8 version seven major upgrades, new debut 1. Newly upgraded case Polishing details are upgraded again 2. Upgrade process The curvature of each blue spinel in the crown is a perfect reflection of the genuine product 3. All sapphire processing uses CNC machining centers Ensure the perfect presentation of the crescent shape of each piece of gemstone glass 4. Glass sealing and coating process upgrade Waterproof function and beauty are improved simultaneously 5. Newly upgraded literally More refined details Perfect Sync Latest Official Version 7. Packaging upgraded again The latest 2020 official warranty card, instruction manual, warranty