Oris, which is on a mission to bring Change for the Better, supports a number of nonprofits working to secure the future of our oceans. This year, we're partnering again with Coral Restoration Foundation, a Florida-based organisation that has become the world's leading expert on coral restoration.

Earlier this year, Oris released the first Oris Carysfort Reef Limited Edition, a 50-piece limited edition rose-gold version of the Aquis GMT diver's watch, to raise funds and awareness for the foundation.

Now, Oris is releasing a second piece in stainless steel, limited to 2,000 pieces and also produced in support of the foundation. The Oris Aquis Carysfort 01 798 77544185-SET MB.

Why? While they cover just 1 per cent of the Earth's surface, coral reefs support at least 25 per cent of all marine fish species. In turn, these sustain the health of our oceans, which produce 70 per cent of the world's oxygen. Our planet depends on their survival. They also contribute hugely to the world's economy. It's estimated that coral reefs have a global value of close to $10 trillion.

Features include

Case: Multi-piece stainless steel case, bi-directional rotating blue and black (day/night) ceramic bezel with GMT scale

Size: 43.50 mm (1.713 inches)

Dial: Blue gradient

Luminous material: Hands and indices with Super-LumiNova? 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

Bracelet: Stainless steel metal bracelet, or orange rubber strap, both with stainless steel security folding clasp with extension

Water resistance: 30 bar (300 m)