Introduced in 2013, the Oris Aquis Depth Gauge is one of the most innovative diving watches of the century. It answered the challenge of how to build a depth gauge into a mechanical watch. It had a pioneering depth gauge function, developed and patented by Oris. Now, the Swiss watchmaker announces a new version of this exceptional dive watch.
In keeping with the company’s 110-year heritage, Oris’s solution to producing a mechanical watch with a depth gauge was pragmatic, with an inlet in the crystal at 12 o’clock. Beneath that was a channel milled into the outside edge of the crystal covering the dial. The inlet allowed water into the channel, creating a watermark that corresponded to yellow depth gauge indications marked on the crystal, giving the diver a clear readout to a depth of 100 metres. Gaskets between the crystal and the case meant the watch was still water-resistant to 50 bar (500 metres).
The genius behind the function was in the application of Boyle Mariotte’s Law, which states that ‘pressure x volume = constant’. In the case of the Aquis Depth Gauge, this means that as a diver wearing the watch descends into the deep, pressure builds, compressing the volume of air in the channel and allowing water to enter the watch through the inlet.
The inlet at 12 o’clock leads to a channel milled into the outside edge of the crystal. Air inside the channel is compressed as water pressure builds during a dive, allowing water to enter into the channel.
This lateral, Oris-patented solution appeared surprisingly simple to some observers, but it’s typical of the Oris philosophy – to find a way of creating the best possible watch at the best possible price. The Oris Aquis Depth Gauge is a ‘real watch for a real person’, as the company strapline promises.
Now Oris has added a second version of the famous diver’s watch to its line-up. The new watch has a yellow rubber strap that features two additional ground-breaking Oris innovations – the safety anchor that prevents the strap from breaking loose, even after a heavy impact; and the sliding sledge clasp, which enables the wearer to adjust the size of the strap without undoing the clasp.
The watch’s 46mm steel case has a resilient, sporty black DLC finish, and the unidirectional rotating bezel inlay is made of tungsten, a material as hard as emerald. Oris’s automatic Calibre 733, based on Sellita SW 200-1, beats inside the watch, powering a date window at 6 o’clock and a power reserve of 38 hours.
Expertly crafted, the Oris Aquis Depth Gauge has a tough 4.5mm thick sapphire crystal, which is twice as thick as an average top glass. The milled channel is indicated in blue.
The Oris Aquis Depth Gauge is presented in a special waterproof case. The set includes a replacement black rubber strap and strap-changing tools. The Oris Aquis Depth Gauge will be available from early May 2015 and is priced CHF 3,250.
Model: Oris Aquis Depth Gauge
Ref. No. 733 7675 4754 Set, Ø 46.00mm
Automatic movement Oris cal. 733, based on SellitaSW 200-1, with date window at 6 o’clock
Multi-piece 46mm stainless steel case, screw-in case back and crown protection with black DLC coating. Water-resistant to 50 bar/500 metres
Diver’s unidirectional revolving top ring with tungsten inlay and minute scale
Protected screw-in crown with black DLC coating
Sapphire crystal, double domed with antireflective coating on both sides, featuring a milled channel that allows water into the watch as part of the depth gauge function
Yellow metre scale read off against watermark in channel milled into sapphire crystal
Black dial with applied indices and Nickel hands, both with white SuperLumiNova® inlay
Yellow rubber strap with Oris-developed safety anchor and quick adjustment sliding-sledge folding clasp
Set includes waterproof case, additional black rubber strap and strap-change tools
Swiss Retail Price CHF 3,250/Set