The CITIZEN Eco-Drive Calibre A060 38.3mm Silver Washi Dial [AQ4100-57B]

The Citizen AQ4100-57B from The CITIZEN collection blends regulated precision engineering with refined aesthetic expression.

At its core beats the Eco-Drive Calibre A060, a solar powered movement individually regulated to sustain an exceptional ±5 seconds per year — a level of stability beyond ordinary quartz expectations. Precision begins with the selection of highly stable crystal oscillators, each approved only after a six-month observation period to confirm long-term performance. After assembly, movements are retested to ensure they meet Citizen’s rigorous criteria.

To preserve accuracy in changing environments, the A060 incorporates an advanced temperature compensation systemthat measures internal temperature 1,440 times per day in 0.1-degree increments and automatically adjusts to counteract environmental influence. This real-time correction helps maintain precision across varied conditions.

Citizen’s proprietary 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.

Beyond regulation and energy efficiency, the A060 integrates intelligent stability systems designed to preserve long-term reliability:

• Shock Detection protects movement alignment after impact

• Automatic Hand Position Adjustment ensures visual precision

• Overcharging Prevention Function regulates energy accumulation

• Insufficient Charge Warning Function alerts when energy reserves are low

• Energy Saving Function conserves power in low-light conditions

• Time Difference Correction enables seamless local time adjustment

• Instant Date Change advances the calendar precisely at midnight

• Perpetual Calendar automatically fixes month length variations and leap years

Each The CITIZEN timepiece is assembled in a dedicated workshop in Nagano, Japan, where master craftsmen known as Meisters supervise final regulation and finishing.

The 38.3mm case and integrated bracelet are crafted in Super Titanium™, a proprietary alloy that is significantly lighter and more scratch-resistant than stainless steel. A dual spherical sapphire crystal protects the silver-tone dial, whose applied indices and precisely finished hands reflect disciplined restraint and technical execution.

The AQ4100-57B is not a conventional quartz watch. It is a regulated solar precision instrument engineered for stable performance, real-time environmental correction, and refined durability.

Technical Specifications

Model: AQ4100-57B
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

Crystal Oscillator Selection:
Only rigorously tested oscillators selected after a six-month stability observation period.

Temperature Compensation System:
Internal temperature measured 1,440 times daily and automatically compensated in 0.1-degree increments.

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 System
Automatic Hand Position Adjustment
Time Difference Correction
Instant Date Change
Perpetual Calendar

Case & Construction

Case Size: 38.3 mm
Material: Super Titanium™
Crystal: Dual Spherical Sapphire Crystal
Dial: Silver-Tone with applied indices
Bracelet: Super Titanium™ bracelet with fold-over clasp and push button
Water Resistance: WR100 / 10Bar / 333ft

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