Oris Aquis Depth Gauge, Second Generation

Swiss watch brand Oris has launched the second generation of Aquis Depth Gauge, one of the world’s most innovative and most distinctive high-performance diver’s watches. A professional grade diving watch, the Aquis Depth Gauge uses a complex scientific principle to create an easy-to-use depth gauge function that’s also safe and accurate.

Oris Aquis Depth Gauge, Second Generation

The new Oris Aquis Depth Gauge watch features three key improvements:

  1. Depth gauge system: In the new watch, the process used to mill the channel into the outer edge of the crystal has been refined so the accuracy and legibility of the Gauge are increased.
  2. Metres-to-feet conversion chart: The caseback has been re-engineered so the metres-to-feet conversion chart is always set at 90 degrees to the 12o’clock position.
  3. The new patented Quick Strap Change system.

This second generation Aquis Depth Gauge watch has a massive 45.80mm diameter stainless steel case and black dial with date at 6 o’ clock and yellow gauge.

Oris Aquis Depth Gauge, Second Generation

Behind the Aquis Depth Gauge’s inventive solution for measuring depth underwater is the Boyle-Mariotte Law, which states for gases that ‘pressure x volume = constant’.

Oris Aquis Depth Gauge, Second Generation

Oris’s engineers calculated that the volume of air in a channel milled into the sapphire crystal would reduce during a dive, compressed under pressure. So during a dive, the volume of air compresses, allowing water to enter the channel. The air then decompresses during an ascent, forcing the water out of the hole. Oris has patented this development.

Oris Aquis Depth Gauge, Second Generation

The hole leading to the channel milled into the outer edge of the sapphire crystal is at 12 o’clock. On dry land, it’s filled with air.

On entering the water, that air is compressed by water pressure. Water then enters the hole and begins to fill the space created in the channel. This in turn creates a watermark visible through the crystal. The watermark corresponds to a yellow gauge running around the outside of the dial, and the two combine to indicate depth. The second-generation watch has a more finely grained channel than before, making the indication even clearer.

The Aquis Depth Gauge allows water into the crystal, but it doesn’t allow water into the watch itself – this would damage the watch’s automatic mechanical movement. Oris engineered the watch so that water can only enter the channel through the hole in the crystal. A gasket around the crystal seals the watch, and is so reliable that Oris has certified the watch as water-resistant to 50 bar (500 metres).

Oris Aquis Depth Gauge, Second Generation

The second generation of the Aquis Depth Gauge is equipped with the independent Swiss watch company’s patented strap change system. A mechanism built into the stainless steel metal bracelet and the black rubber strap means that the wearer can quickly and simply switch from one to the other and back again.

Oris Aquis Depth Gauge, Second Generation

Technical details

Model: Oris Aquis Depth Gauge, Second Generation
Ref. no. 01 733 7755 4154-Set MB

Multi-piece stainless steel case, uni-directional rotating bezel with ceramic insert
Size: 45.80 mm, 1.803 inches
Top glass: Sapphire, domed on both sides, double-sided anti-reflective coating
Case back: Stainless steel, screwed, engraved with metres-to-feet conversion chart
Operating devices: Stainless steel screw-in security crown
Water resistance: 50 bar (500 m)
Interhorn width: 24 mm

Calibre Oris 733
Dimensions: Ø 25.60 mm, 11 1/2’’’
Winding: Automatic
Power reserve: 38 hours
Vibrations: 4 Hz (28’800 A/h)

Centre hands for hours, minutes and seconds, date window at 6 o’clock, instantaneous date, date corrector, fine timing device and stop-second
Jewels 26

Black dial
Hands and indices with Super-LumiNova®

Stainless steel metal bracelet or black rubber strap, both with Oris-patented Quick Strap Change system and Oris-developed folding security clasp with extension and safety anchor systems

May 2021

Swiss retail price
CHF 3’700 with metal bracelet
CHF 3’600 with rubber strap

Presented in a waterproof Peli case diving box