Citizen Promaster Unite with Blue Limited edition BN1025-08L

The Citizen Promaster Marine BN1025-08L “Unite with Blue” is a limited-edition, professional-grade saturation diver’s watch engineered for extreme performance. This timepiece features a robust 46 mm stainless steel case and showcases a revolutionary pigment-free dial. By using micro-structured surfaces, the dial transforms light into a deep, multifaceted spectrum of blue, reflecting the shifting moods of the ocean. Designed for serious underwater exploration, this watch is ISO 6425 compliant and is built to withstand the rigorous demands of professional saturation diving.

Powered by the high-precision Caliber E365 Eco-Drive movement, this watch draws energy from any light source, offering an impressive one-year power reserve on a full charge. The watch is equipped with critical dive functionality, including a helium escape valve for saturation diving, a unidirectional rotating elapsed-time bezel, and a screw-down crown. It is protected by anti-reflective sapphire crystal and boasts a 300-meter water resistance rating. The BN1025-08L is secured by a sustainable BENEBiOL™ plant-derived polyurethane strap, featuring an extension piece to ensure a proper fit over a wetsuit. This is a true tool watch that fuses sustainable innovation with world-class professional durability.

Basic Information

Reference: BN1025-08L
Collection: Promaster Marine (Unite with Blue Limited Edition)
Case Diameter: 46 mm
Case Thickness: 16.3 mm
Case Material: Stainless steel
Water Resistance: 300-meter (30 bar) – ISO 6425 Compliant (Saturation Diver)
Movement Type: Eco-Drive (Solar-powered quartz)

Movement & Features

Caliber Number: E365
Power Reserve: Approximately 1 year (on full charge)
Functions: Hours, minutes, seconds, date display
Special Features: ISO 6425 certified, Helium escape valve, Unidirectional bezel, Eco-Drive technology, Worldwide limited edition of 4,800 pieces

Exterior

Crystal: Anti-reflective sapphire crystal
Dial Colour: Deep blue (structural colour/pigment-free)
Band Material: BENEBiOL™ polyurethane strap
Band Colour: Black
Clasp Type: Buckle with strap extension
Case Back: Screw case back