Men's Casio Data Bank Watch. ABX22BU-8A Imported Twincept Display (choice of analog or digital overlay), 20 Page Databank 50M Water Resistant, World Time, Hourly Time Signal Daily Alarm, /100 second stopwatch, Auto Calendar (pre-programmed until the year 2039) 12/24 Hour Formats, Accuracy: +/-30 seconds per month ,Battery CR2016 Case Size: 38.5 mm Diameter, 13 mm Thickness