The Citizen AQ4100-65M from The CITIZEN collection embodies engineered precision expressed through disciplined design and advanced stability systems.

At its core is the Eco-Drive Calibre A060, a solar quartz movement individually regulated to maintain an exceptional ±5 seconds per year — a performance standard achieved through rigorous control and observation. Only the most stable crystal oscillators are selected after a six-month evaluation period to verify long-term consistency before assembly, and movements are retested post-casing to ensure Citizen’s strict tolerances are met.

To further reinforce accuracy across varied conditions, the A060 includes an advanced temperature compensation system that tracks internal temperature 1,440 times per day in 0.1-degree increments, enabling automatic real-time adjustment. This compensates for environmental influence, protecting precision against thermal fluctuation.

Citizen’s proprietary Eco-Drive continuously converts natural and artificial light into stored energy, eliminating the need for battery replacement. Once fully charged, the movement can operate for approximately 1.5 years without additional light exposure.

Beyond precision and autonomy, the A060 integrates intelligent protection and performance systems designed to preserve long-term reliability:

• Shock Detection protects movement alignment after impact

• Automatic Hand Position Adjustment ensures visual precision

• Overcharging Prevention regulates energy accumulation

• Insufficient Charge Warning alerts when energy is low

• Energy Saving Function conserves power in darkness

• Time Difference Correction enables seamless hour adjustment

• Instant Date Change ensures precise midnight transition

• Perpetual Calendar automatically adapts to month lengths and leap years

Each The CITIZEN timepiece is assembled in a dedicated workshop in Nagano, Japan, where master craftsmen known as Meisters oversee 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 rich blue dial, which features precisely finished applied indices and hands — a visual expression of technical clarity and refined restraint.

The AQ4100-65M is not a conventional quartz watch. It is a regulated solar precision instrument engineered for stable performance, real-time environmental compensation, and enduring execution.

Technical Specifications

Model: AQ4100-65M
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 are selected following a six-month stability evaluation period.

Temperature Compensation System:
Internal temperature measured 1,440 times per day 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: Blue with applied indices
Bracelet: Super Titanium™ bracelet with fold-over clasp and push button
Water Resistance: WR100 / 10Bar / 333ft

Citizen Authorized Dealer | Free Shipping Within Canada