The Citizen AQ4100-65L from The CITIZEN collection is a disciplined expression of Japanese precision—an Eco-Drive high-accuracy instrument built for stability on an annual scale. At its core is the Eco-Drive Calibre A060, individually regulated to deliver an extraordinary ±5 seconds per year, a standard achieved through rigorous component selection and advanced correction systems.

Precision begins before assembly. Only the most stable crystal oscillators are approved following an extended observation and testing process, and each movement is verified again after casing to ensure Citizen’s strict standards are upheld.

To protect accuracy across changing conditions, the A060 incorporates an advanced temperature compensation systemthat measures internal temperature 1,440 times per day in 0.1-degree increments, automatically adjusting in real time. Because temperature variation is a primary factor influencing quartz deviation, this continuous analysis helps maintain consistent precision through everyday wear.

Citizen’s Eco-Drive technology continuously converts natural or artificial light into stored energy, eliminating battery replacement while providing approximately 1.5 years of autonomy when fully charged.

A full suite of intelligent stability functions supports long-term reliability, including shock detection, automatic hand position adjustment, energy management safeguards, and a perpetual calendar engineered for precise datekeeping.

A sapphire crystal protects the watch’s blue dial crafted from Japanese washi paper, producing a refined play of light, texture, and depth—an aesthetic signature that reinforces The CITIZEN’s quiet authority. The case is finished in silver-tone Super Titanium™, paired with a matching five-link Super Titanium™ bracelet secured by a fold-over clasp with push-button release, delivering exceptional lightness, comfort, and durability.

The AQ4100-65L is not a conventional quartz watch. It is a regulated solar precision instrument designed for autonomy, environmental stability, and refined execution.

Technical Specifications

Model: AQ4100-65L
Collection: The CITIZEN

Movement & Regulation

Calibre: Eco-Drive A060 (Solar Powered)
Accuracy: ±5 seconds per year
Power Reserve: Approximately 1.5 years when fully charged

Temperature Compensation System:
Measures internal temperature 1,440 times daily in 0.1-degree increments and automatically adjusts to maintain precision.

Solar Energy Conversion:
Continuously converts light into stored energy — no battery replacement required.

Stability & Intelligent Functions

Power Reserve Indicator
Overcharging Prevention Function
Insufficient Charge Warning Function
Energy Saving Function
Shock Detection
Automatic Hand Position Adjustment
Time Difference Correction
Instant Date Change
Perpetual Calendar

Case & Construction

Case Size: 38 mm
Case Material: Silver-Tone Super Titanium™
Crystal: Dual Spherical Sapphire Crystal
Dial: Blue (Japanese washi paper dial)
Band: Bracelet — Super Titanium™
Clasp: Fold Over Clasp with Push Button
Water Resistance: WR100 / 10Bar / 333ft

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