Security

The bezel features the Bühlmann decompression security stops algorithm.

Depth

The Decompression 01 is water-resistant up to 575m-1668ft and features a helium valve.

Readability

The case is inclined by 5 degrees to optimise the readability of the dial and bezel information.

Push lock-unlock

A mechanical mechanism integrated in the bezel locks and unlocks the crowns and the helium valve.

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Decompression 01 Small Seconds “Druckkammer”

Automatic (Sellita SW261)
46mm
Small seconds movement
Stainless steel case with helium valve
Decompression security stops bezel
Inner ADT bezel and fly-no fly indicator
Druckkammer colour dial
575m-1886ft water-resistant
5 Degrees case inclination
Rubber strap
Swiss made
Total edition 100pcs

35% Units left
Ends 30.06.2022
7/20
Webstore Price: CHF 1,495.00
Reservation saving: CHF 220.00
July 2022
CHF 1,275.00
Delivery July 2022
Reserve now
More info
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Decompression 01 Small Seconds "373"

Automatic (Sellita SW261)
46mm
Small seconds movement
Stainless steel case with helium valve
Decompression security stops bezel
Inner ADT bezel and fly-no fly indicator
Druckkammer yellow colour dial
575m/1886ft water-resistant
5 Degrees case inclination
Rubber strap
Swiss made
Total edition 50pcs

75% Units left
Ends 30.06.2022
15/20
Webstore Price: CHF 1,495.00
Reservation saving: CHF 220.00
July 2022
CHF 1,275.00
Delivery July 2022
Reserve now
More info
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Decompression 01 Small Seconds Blue

Automatic small seconds movement (Sellita SW261)
46mm diameter
Stainless steel case with helium valve
Decompression security stops bezel 
ADT scale and fly-no fly indicator 
575m-1886ft water-resistant
5 Degrees case inclination.
Genuine rubber strap
Swiss made
Total edition 50pcs

65% Units left
Ends 30.06.2022
19/29
Webstore Price: CHF 1,495.00
Reservation saving: CHF 220.00
July 2022
CHF 1,275.00
Delivery July 2022
Reserve now
More info
product_image

Decompression 01 Small Seconds Black

Automatic (Sellita SW261)
Small seconds
46mm
Stainless steel case with helium valve
Decompression security stops bezel
Inner ADT bezel and fly-no fly indicator
Black dial
575m-1886ft water-resistant
5 Degrees case inclination
Rubber strap
Swiss made
Total edition 100pcs

72% Units left
Ends 30.06.2022
37/51
Webstore Price: CHF 1,495.00
Reservation saving: CHF 220.00
July 2022
CHF 1,275.00
Delivery July 2022
Reserve now
More info

Key features

The mother of all diving watches

Safe diving started with decompression science. By featuring the Bühlmann decompression securities stops algorithm on the bezel, the Decompression 01 deserves the defintion of "mother of all diving watches".

The lock-unlock system

The bezel of the Decompression 01 unlocks and locks the screw-in crowns and the helium valve. This security system ensures that the settings of the watch are not indavertedly modified while diving.

pt tol i.g. = (p amb/b) + a

Bühlmann's goal was to incorporate the empirical results obtained in over 450 overpressure tests into a computer model to enable the dive calculations across different variables like: dive height (ABSL), dive length, dive depth, dive profile, breathing gas used and type of dive (single or repetitive).

He succeeded with the ZH-L16A algorithm in 1986. This calculation model is featured on the bezel of the Decompression 01.

The deepest dive

Life Magazine reported on the world-record
in Brissago
, Switzerland.
On June 28th 1961, with the aid of Bühlmann's
calculations and procedures, intrepid diver
Hans Keller reached an unprecedent
depth for Mankind of 220m

The decompression model and gas mixture procedures developed by Prof. Bühlmann led to to multiple diving records: 1959 Lake Zürich, Switzerland (120M), 1961 Brissago, Switzerland (220M), 1962 Catalina Islands, California (311M), 1966 Porto San Stefano, Italy (220M exposure to saturation), 1969 Alverstoke, UK (350M exposure to saturation) and finally in 1981 the 575M depth record in the Zürich hyperbaric chamber.

From 1964 onwards A.Bühlmann has been concentrating on safe decompression procedures for professional divers on long-term dives to great depths that have allowed the development of new oil and gas fields in the area of the continental shelf.

The results of Bühlmann’s research that began in 1959 were published in his book “Decompression”. This book is regarded as the most complete public reference on decompression calculations and was used soon after in electronic dive computer algorithms.

Meet Albert A. Bühlmann

Professor Albert Alois Bühlmann (1923 – 1994) was a Swiss physician who significantly contributed to decompression science at the University Hospital in Zürich. His significant impact on diving ranged from complex commercial and military diving to recreational diving. He is held in high regard for his professional ethics and attention to his research subjects.

About Albert A. Bühlmann

35 years of research in diving medicine at the service of safe commercial, military and recreational diving

The inspiration

The inspiration for the watch has been the circular decompression calculator by A. Bühlmann. The translation of this calculator to the Decompression 01 bezel and the way it has to be operated in connection to time has been the driver of the bezel-dial design concept.

We designed the Bühlmann Decompression 01 like A. Bühlmann would have done. We have integrated 35 years of breathing science, empirical tests and depth records by functionally featuring his algorithm on the uni-directional turning bezel of the watch. This required a special re-design of the circular calculator itself, as well as a new dial and time reading configuration to make the scale usable on a timepiece and safe for diving.

Together with Thomas Bühlman, the son of Alfred Bühlmann, and his team, we have adopted new solutions for a diving watch to make it special, unique and professional. The legacy of Prof. Bühlmann lives on in the Decompression 01.

The Watch

The 1975 Druckkammer

At the beginning of the 1970’s, the hyperbaric chamber of the University of Zurich became outdated. The diving depth was limited to 300 meters. Space was also limited, especially with regard to the treatment of accident victims. There was also no water tank in which diving missions in the water could be simulated.

With the financial help of the Canton of Zürich, the Federal Military Department and Shell International a new state-of-the art hyperbaric chamber was built. This new overpressure chamber with a water tank, the "Druckkammer", was designed for an overpressure of 101ata, which corresponds to a depth of 1000m.

The new hyperbaric chamber was put into operation in 1975.

Inside the Druckkammer

In this exclusive footage from the 1970s, filmed inside the Druckkammer during live decompression tests, you can see divers going about their test routines.