Nobila watches come in three different series: The Nobila Sorts series, the Nobila Professional series and the Nobila Pro Diver series. They have accurate quartz movement and the hands of the wristwatch proportionately rotate while changing time. Nobila's Pro Diver Series have the patented depth meter sensor and display and a 200 meter water resistance. With Nobila's professional diving watches (Trident Dive Sensor) you can even go underwater at the depth of 300 meters. It also alerts the Divers with its rapid ascent warning signal and alarm whenever they cross the maximum depth limit. It has one way turning bezel and a rotating crown and case. The other features include a 60-miniute Countdown Timer, 12 or 24 hour Time and Sapphire glass. The Nobila Sports series have 22 Karat gold finishes and 1/20 second chronograph (yacht timer), a 60 minute countdown counter and a calendar. It has two alarms and one-way ratcheting elapsed time bezel. The Nobila wristwatch sports a gold crown and bezel and also the Sapphire Crystal. The wristwatch case has the Noblia badge with the serial number, model number, water resistant and stainless steel symbol/marking. The watches are crafted out of a high quality stainless steel case. The Nobila watch's instruction manual is very precise and describes the watch details, craftsmanship, specifications and the function. The technical features, design and manufacturing meet the ISO standards.