http://heuerville.wordpress.com/2012/03/18/tag-heuer-980-023n-deep-dive-1000m/
Super water-resistant – Model from the top of the TAG-Heuer’s range of professional diving watches. Water-resistance 1000 M (3300 ft), Quartz, date, stainless steel case, screw-in crown, uni-directional turning bezel 0-60 minute with ratchet. Mineral glass. Available with steel bracelet or rubber strap. Special: 1000m/quartz. Perfect perception of time to 1000m in depth,circa 1986's