Clasp type: folding Oyster safety clasp with 5 mm easy-adjustable link extension system
Case back: screw-down back
Water resistance: 100 meters
Lug spacing: 20 mm
MATERIALS
Case material: Oyster steel
Dial: black lacquer, 18K yellow gold hour-markers, easy-to-read Chromalight luminous (persistent blue light); 18K yellow gold hands, easy-to-read Chromalight luminous (persistent blue light)
Bezel in 18K yellow gold with bi-directional rotating 24-hour graduated bezel; two-tone gray and black Cerachrom ceramic bezel with molded numerals and indexes
Crystal: scratch-resistant sapphire
Crown: screw-down, triple water-resistant with triple locks