Product Description

CITIZEN Promaster Marine BN0156-05E Eco-Drive Diver Watch is a professional-grade dive watch designed for serious underwater performance and everyday durability. Part of the Promaster Marine Series, it features ISO-certified 200m water resistance and essential diver functions for safety and reliability.

Powered by CITIZEN’s proprietary Eco-Drive technology, the watch converts any light source into energy, eliminating the need for regular battery replacement. Once fully charged, it can run for up to 6 months even in complete darkness.

The watch is built with practical diving features including a unidirectional rotating bezel, screw-down crown, and high-visibility luminous hands and markers for easy readability underwater or in low-light environments.

For enhanced comfort, the crown is positioned at 4 o’clock, preventing interference with the wrist while improving ergonomics during active use.

Key Features

• Eco-Drive Solar Movement – Powered by light, no battery replacement required
• ISO Certified Diver Watch – Professional 200m water resistance
• High Visibility Dial – Luminous hands and markers for underwater readability
• Unidirectional Rotating Bezel – Prevents accidental dive time adjustment
• Screw-Down Crown – Improved water resistance and safety
• 4 O’clock Crown Position – Enhanced wrist comfort
• Quick Start Function – Starts quickly after exposure to light
• Shock Detection System

Specifications

Brand: CITIZEN
Series: Promaster Marine
Model: BN0156-05E

Movement: Eco-Drive (Cal. E168)
Power Reserve: Approx. 6 months (fully charged)
Accuracy: ±15 seconds/month

Case Material: Stainless Steel
Case Diameter: 44 mm
Case Thickness: 11.5 mm

Crystal: Anti-reflective Mineral Crystal
Bezel: Unidirectional Rotating Diver Bezel
Crown: Screw-down Crown

Strap Material: Urethane Rubber Strap
Band Width: 20 mm
Adjustable Wrist Size: 146–224 mm

Water Resistance: 200m Professional Diver (ISO Standard)
Magnetic Resistance: Type 1

Functions

• Date Display
• Date Quick Correction
• Charge Warning
• Overcharge Prevention
• Quick Start Function
• Shock Detection

Weight: 94 g
Country of Manufacture: Japan