CVSTOS JETLINER II SKULL INKVADERS / SAPPHIRE Cvstos Jetliner II Skull Inkvaders / Sapphire,  41 mm ,  Cvstos CVS410, Black PVD treatment or rhodiated,  Self-winding mechanical, Skeletonized,  with function: Date, Hour, minute, seconds. Reference: (41mm) A10101.4185002 100 Meters / 10 ATM CASE Challenge II , Tonneau-shaped 53.7 x 41 mm  MATERIAL 5N Red Gold, Sapphire COLOR Sapphire CRYSTAL Sapphire with none-reflective coating on both sides CASEBACK Open with sapphire crystal CROWN Screw-down, 5N Red Gold or Grade 5 Titanium, polished with rubber insert SCREWS Polished Grade 5 Titanium, exclusive CVSTOS TECHNOLOGY pattern DIAL Skull dial designed by Christian Nguyen. “INKVADERS”