18.0510.4021/01.c492 Zenith. This watch has 40 mm 18K rose gold case with fixed gold bezel. Silver dial with skeletal window, rose gold-tone hands and index & roman numeral hour markers. The Famous El Primero Certified COSC Automatic Chronograph Movement. Alligator leather strap with deployment buckle. Water resistance up to 50 m/ 165ft. All pre-owned watches are not returnable. One year warranty for all watches. 18.0510.4021/01.c492 Zenith. 18K Rose Gold Watch (NL)