Inspired by the beautiful oceans that unite the world, the watches of Citizen's UNITE with BLUE series join the colours of the seven seas on one 100% recycled polycarbonate dial. This timepiece, which comes as part of the dive-ready Promaster collection, marks a unique take on the classic sports style. The robust silver-tone stainless steel exterior ensures up to 200 metres of water resistance, making use of a 4 o'clock screw-down crown placement and an easy-grip bezel executed in a two-tone design is reminiscent of a sparkling emerald green ocean. A strap made from biomass-based polyurethane, which includes plant-based materials, secures the timepiece to the wrist. The highly-legible dial is brought to life through pigment-free ink that uses light – the same light that powers the Eco-Drive technology within – to reflect off the surface of the ink microstructures and create an array of aquatic shades. Limited to 7,000 pieces worldwide.