If you looked up the term 'Professional Diver" in the dictionary, the diver would be wearing this Helson Shark Diver watch. 45MM diamneter case, 24mm lug width. This is a sturdy watch. Built for deep dives and built to last. The lume is outstanding and long lasting. Comes on the Helson stainless bracelet, along with a black Helson branded rubber strap, I also included an Ammo style canvas leather trimmed, leather lined watch band. Comes in the Helson leather watch roll, warranty card, watchyband tool, and Helson generic brown box. You can buy it for $649.00 on Helson's website, or you can get it here for a lot less, with extra watchbands. Thanks for looking!