sentences:  The very first valve prototype was given to Dr. Ralph Werner Brauer, a professor for physiology at Duke University and director of the Wrightsville Marine Biomedical Laboratory of the University of North Carolina Wilmington.Brauer tested the watch during a series of Physalie dives at the Comex Hyperbaric Center in Marseille, France.In the past, it was wrongly assumed the Sea-Dweller was developed in cooperation with Comex S.A. industrial deep-sea diving but the French company became a partner of Rolex only in late 1971.