Limited-edition diving watch

CITIZEN PROMASTER Blue Ocean – featuring an aquatic dial and Eco-Drive

For 50 years, CITIZEN has focused on light as a source of energy – in the form of solar-powered Eco-Drive movements manufactured in-house. Often in combination with complex and translucent dials.

This is also the case with the latest limited-edition, ISO-compliant diving watch from the PROMASTER Marine range. With its shimmering aquatic dial, which is pigment-free and made from recycled plastic, it really makes a statement. Not just in terms of how it looks, but also when it comes to sustainability. Another great feature: The Blue Ocean's strap is made from BENEBiOL™ – a biomass-based plastic.

Limited to 8,700 pieces worldwide, this diver’s watch isavailable since June 2026 in specialist shops and on citizenwatch.eu.

Pigment-free ink, Eco-Drive and bio-based strap material

One of the Blue Ocean’s standout features is clearly its shimmering aquatic dial. It is printed using a special, pigment-free ink from Fujifilm (Structural Colour Inkjet Technology). The bright colours and dynamic effect are created by the reflection of light off the surface of countless microstructures within the ink layer.

Inside, it is powered by the brand’s own light-powered Eco-Drive E168 movement, which has a power reserve of 180 days. It can manage without light for that long. The strong 44 mm case, featuring a unidirectional rotating bezel, is water-resistant up to 20 bar and conforms to ISO standard 6425 for diving watches.

The Blue Ocean strap is made from BENEBiOL, a bio-based raw material for polyurethane (polycarbonate diol) developed by Mitsubishi Chemical Corporation. This material is used here mainly to ensure higher durability.

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