The Bühlmann Decompression 01 Diving Watch 

Commercial and recreational diving only really started at the end of the 20th century when the parameters of decompression sickness could be safely managed. It has been scientist Dr. Albert Bühlmann who solved the decompression problem, after years of empirical research and depth records carried out in the open water and in his decompression chamber at the University Hospital of Zürich.
By functionally featuring Dr. A. Bühlmann’s original decompression algorithm on the clockwise turning unidirectional turning bezel, the Decompression 01 symbolises the beginning of safe diving and therefore rightfully deserves the distinction of being the “Mother” of all diving watches.
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