Oris Dat Watt Limited Edition

Swiss watch brand Oris introduces a special edition diving timepiece created with the Common Wadden Sea Secretariat and its mission to conserve the Wadden Sea, the world’s largest tidal system and a UNESCO World Heritage Site. Based on the Oris Aquis diver’s watch, the Dat Watt Limited Edition is named after a local dialect for the Wadden Sea.

Oris Dat Watt Limited Edition

Known for their contributions for conserving the nature, Oris has been working with non-profit environmental organisations and clean-up movements all over the world. The latest project is with the Common Wadden Sea Secretariat (CWSS), a tri-lateral organisation covering Denmark, Germany and the Netherlands that works to conserve and protect the Wadden Sea, the world’s largest unbroken tidal flat system. In 2009, UNESCO awarded it World Heritage Site status to reflect its importance to global biodiversity.

The Wadden Sea

The Wadden Sea is the largest unbroken tidal flat and barrier-island depositional system in the world. Covering 11,500km2 in the North Sea, it is largely flat and hugely bio-diverse. At any one time, there are more than 6 million birds inside its borders. Each year, between 10 and 12 million migratory birds pass through it. The salt marshes host around 2,300 species of flora and fauna, and there are a further 2,700 species in the marine and brackish areas, and more than 30 species of breeding birds.

The Wadden Sea

The Wadden Sea covers an area of 11,500km2, has a 500km coastline and is a vital stopping point for more than 10 million migratory birds every year. This makes it one of the most important natural properties on the planet. In fact, experts have calculated that biodiversity on a worldwide scale is reliant on the Wadden Sea.

The Wadden Sea

To this point, it’s also remarkable because it’s one of the few remaining natural large scale intertidal ecosystems where natural processes continue to function largely undisturbed. This is why it needs protecting. As with so many marine environments, the Wadden Sea is under constant threat from fishing, harbour development, oil and gas rigs, wind farms, maritime traffic, residential and tourism development, and the impact of climate change. This is the role of the Common Wadden Sea Secretariat, acting on behalf of the Trilateral Wadden Sea Cooperation. Its executive secretary is Bernard Baerends.

This organization is funded on an equal one-third basis by the three nature and environment ministries of Denmark, Germany and the Netherlands. Its partnership with Oris is the first with a private company outside the Wadden Sea area. This relationship set to run for a minimum of three years. It begins with the specially developed Dat Watt Limited Edition – Dat Watt means ‘the Wadden Sea’ in Low German.

Oris Dat Watt Limited Edition

The Dat Watt Limited Edition is a special diving timepiece based on the brand’s popular Aquis family of diving watches.

reference 01 761 7765 4185-Set - Oris Dat Watt Limited Edition

Its dial displays the lunar cycle and tidal range in the Northern Hemisphere via the Oris-developed Pointer Moon function, created for professional divers. This works using a central white pointer hand that once aligned with the correct day in the 29.5-day lunar cycle, shows the corresponding tidal range via the white outline on the dial. The same hand indicates the waxing and waning of the moon.

01 761 7765 4185-Set - Oris Dat Watt Limited Edition

Featuring a 43.50mm diameter case in stainless steel, the watch has a water resistance of 300 meters. This 2,009 piece limited edition marks the year the Wadden Sea was awarded UNESCO World Heritage Site status.

Technical details

Model: Oris Dat Watt Limited Edition
Reference: 761 7765 4185-Set

Multi-piece stainless steel case, unidirectional rotating bezel
Size: 43.50 mm (1.713 inches)
Top glass: Sapphire, domed on both sides, anti-reflective coating inside
Case back: Stainless steel, screwed, special engravings
Operating devices: Stainless steel screw-in security crown with crown protection
Water resistance: 30 bar (300 m)

Gradient blue/grey
Hands and indices with Super-LumiNova®

Stainless steel metal bracelet, folding clasp with extension

Calibre Oris 761
Winding: Automatic
Power reserve: 38 hours

Centre hands for hours, minutes and seconds, centre hand moon phase, date window, instantaneous date, date corrector, fine timing device and stop-second

Special edition
Supplied in a special presentation box
Limited to 2009 pieces

Swiss retail price
CHF 2,450

Available from
May 2021