Oris launches the new Great Barrier Reef Limited Edition IV

This timepiece supports the Reef Restoration Foundation, an Australian not-for-profit organization, dedicated to conserving Australia’s Great Barrier Reef. It is a limited edition of 2000 pieces.

Oris has just launched the Great Barrier Reef Limited Edition IV. It is created to support the Reef Restoration Foundation, an Australian not-for-profit organization which is dedicated to conserving Australia’s Great Barrier Reef.

“We’re delighted to announce a beautiful new watch made in support of our friends at Reef Restoration Foundation, the Australian not-for-profit organisation that’s committed to conserving the Great Barrier Reef. The foundation was established in 2016 and has pioneered coral planting initiatives on the world’s largest and most diverse reef in a bid to counter the effects of warming oceans and the devastating coral bleaching events they precipitate.”

The Great Barrier Reef Limited Edition IV is based on Oris’s next-generation Aquis family. It is the first limited-edition Aquis Date with a 43.50 mm case diameter to feature Calibre 400, Oris’s “game-changing five-day automatic.” 

Key Features


The Great Barrier Reef Limited Edition IV’s functions include:

– Central hours and minutes.

– Centre seconds.

– Date at 6 o’clock.

– Fine timing device and stop-second function.


The Great Barrier Reef Limited Edition IV’s dial features include:

– It features a blue gradient dial. It is Oris’s first gradient dial timepiece where the gradient falls from 12 o’clock, rather than originating from the centre of the dial.

– The hour, minute, and lollipop-shaped seconds hands are coated with Super-LumiNova® (for the seconds hand, only the circular “lollipop” part towards its tip.)

– The 11 applied hour-markers are coated with Super-LumiNova®.

– Its outer dial features a minute track, graduated in increments of 5-minutes.

Case and Bracelet

The Great Barrier Reef Limited Edition IV’s case and bracelet features include:

– It features a multi-piece case made of stainless-steel.

– Its unidirectional rotating bezel features a minutes scale with a tungsten bezel insert.

– Its case diameter is 43.50 mm or 1. 713 inches.

– On its dial side, it features a sapphire crystal, domed on both sides, with anti-reflective coating inside.

– It has a stainless-steel screwed caseback, where it features special engravings of the Great Barrier Reef. “Great Barrier Reef Limited Edition” and the individual number of each timepiece XXXX / 2000 are engraved on the caseback.

– It features a stainless-steel screw-in security crown.

– It is water resistant up to 30 bar / 300 metres / 1000 feet.

– It comes with a multi-piece stainless-steel metal bracelet. It features Oris’s patented Quick Strap Change System and a security folding clasp with Oris’s patented quick adjust clasp system.

– Its interhorn or strap width is 23 mm.


The Great Barrier Reef Limited Edition IV’s is powered by Oris Calibre 400, an in-house mechanical automatic winding calibre. Its movement features include:

– It powers the hours, minutes, seconds, and instantaneous date, and has a fine timing device and stop second function.

– It has a diameter of 30 mm or 13 ¼ inches.

– It has 21 jewels.

– It beats at a frequency of 28,800 vph or 4 Hz.

– It has a power reserve of 120 hours or 5 days, because of its twin barrels featuring extended mainsprings. Each mainspring stores 2.5 days of power.

– It has an accuracy of -3/+5 seconds a day (well within COSC tolerances).

– It is highly anti-magnetic, as it features more than 30 nonferrous, anti-magnetic parts. “It deviated less than 10 seconds a day after exposure to 2,250 gauss, surpassing ISO 764 standards.”

– It features “a more stable rotor system.”  It replaces the ball bearing, a common concern in automatic movements, with “a low-friction slide bearing system, simplifying the design, increasing efficiency, and reducing wear and tear.”


The Great Barrier Reef Limited Edition IV comes with a 2-year warranty. It can be extended to a 10-year warranty for free if owners register on MyOris. The warranty applies both to the timepiece and movement. Oris recommends a 10-year service interval, “barring accidental damage or water-resistance checks.”

Our Thoughts

Oris makes simple, robust, and reliable timepieces, accessible to a broader segment of watch collectors. As with the Great Barrier Reef Limited Edition IV, they are known to create timepieces that support noble causes. All these attributes make Oris a gem of the Swiss watch industry. With this timepiece, 2000 fortunate collectors will receive a numbered timepiece that is handsome, benefits from excellent attention to detail – dial, case, and bracelet – and features Calibre 400, a superb automatic movement with a 5-day power reserve. In addition, they would have helped support the conservation of Australia’s Great Barrier Reef. We look forward to doing a hands-on review of the Great Barrier Reef Limited Edition IV soon.

Additional Details

Name: Oris Great Barrier Reef Limited Edition IV

Reference: 01 400 7790 4185-Set

Price: Swiss Franc (CHF): 3,900 / United States Dollar (USD): 4,500

Limited edition of 2000 numbered pieces. Available at selected Oris retailers worldwide and on the Oris website.

Also Read: https://thecorneaimpression.com/oriss-handsome-new-divers-sixty-five-calibre-400/

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