The CITIZEN Collection NH9131-73A is a classically modern mechanical timepiece that showcases the beauty of traditional watchmaking. Featuring an open-heart design at the 6 o’clock position, this model allows you to admire the delicate movement of the balance wheel—the heart of the watch—directly from the dial.
The white dial is accented with elegant blue hands, creating a refined contrast that enhances both sophistication and legibility. A subtle radial pattern spreads outward from the circular open-heart window, adding depth and visual interest to the clean design. The case back is finished with a see-through construction, allowing you to enjoy the view of the rotating rotor and mechanical movement from both sides.
Powered by a Japanese automatic movement (Caliber 8229), the watch supports both automatic and manual winding. It offers an accuracy of -20 to +40 seconds per day and provides approximately 42 hours of power reserve when fully wound. The mechanical movement is driven by a mainspring that is automatically wound through the natural motion of the wrist.
Crafted with a stainless steel case and bracelet, this model offers durability and a polished appearance suitable for business or formal settings. The bracelet features a triple-fold push-button clasp for secure and comfortable wear. The dial is protected by crystal glass, and 5 bar water resistance ensures suitability for everyday activities such as hand washing and light water exposure.
Key Specifications
Display type: Analog
Movement: Japanese automatic (Caliber 8229), automatic with manual winding
Accuracy: -20 to +40 seconds per day
Power reserve: Approximately 42 hours
Water resistance: 50 meters (5 bar)
Case material: Stainless steel
Band material: Stainless steel
Clasp: Triple-fold push-button clasp
Dial color: White
Case shape: Round
Glass: Crystal glass
Case back: See-through
The CITIZEN Collection NH9131-73A combines elegant open-heart aesthetics with dependable mechanical performance. It is an excellent choice for those who appreciate traditional craftsmanship, refined design, and the distinctive character of an automatic watch.