AT8020-54L

No regular battery replacement is required.
Citizen’s proprietary Eco-Drive technology converts sunlight and even small amounts of indoor light into electrical energy, continuously powering the watch. Once fully charged, it operates for long periods even in complete darkness, eliminating the need for periodic battery changes.

Always keeps accurate time.
This model receives standard radio signals transmitted from atomic clocks—known for an accuracy of one second in 100,000 years—and automatically corrects the time and calendar in four regions worldwide: Japan, China, the United States, and Europe.

Displays local time anywhere in the world in just two steps.
Equipped with the Direct Flight function, allowing easy adjustment to local time when traveling abroad.

Resistant to shocks and magnetism for precise timekeeping.
Citizen’s proprietary PerfeX technology integrates three features—JIS Class 1 anti-magnetic resistance, shock detection, and automatic hand correction—to prevent hand misalignment caused by impact or magnetic interference.

Product Specifications

Model Number: AT8020-54L
Caliber No.: H800

Movement: Eco-Drive (solar-powered)
Accuracy: ±15 seconds per month (without radio signal reception)
Power Reserve: Approx. 10 months (with power-save function activated)

Radio Signal Reception: Japan / China / USA / Europe

Weight: 179 g
Thickness: 12.0 mm
Case Size: 43.0 mm (width)

Case Material: Stainless steel
Case Finish: Partial blue-tone plating

Band Material / Type: Stainless steel
Clasp: Triple-fold push-button clasp
Band Width: 23.0 mm
Adjustable Wrist Size: 150–194 mm

Glass: Sapphire crystal with anti-reflective coating
Water Resistance: 20 ATM (200 meters)
Magnetic Resistance: JIS Class 1

Design Features:

• Luminous hands and indexes

• Slide rule bezel (aviation calculation scale)

Functions:

• Power reserve indicator

• Charge warning function

• Overcharge prevention function

• Power-save function

• Approx. 10 months of operation on full charge (with power save)

• Multi-band radio-controlled timekeeping (Japan, China, USA, Europe)

• Automatic signal selection

• Scheduled reception

• Manual reception

• Perpetual calendar

• Day & date display

• 24-hour display

• 1/20-second chronograph (up to 60 minutes)

• Direct Flight function

• World time (26 time zones)

• Daylight saving time function

• PerfeX Multi 3000 (JIS Class 1 anti-magnetic, shock detection, automatic hand correction, four-region radio reception)

JY8078-52L – Blue Angels

Inspired by aircraft cockpit instruments, this model features a highly legible dial design paired with a bold stainless steel case that evokes the strength and presence of an aircraft body. The dial includes a special “Blue Angels” marking, making it a distinctive limited-design model.

Part of the PROMASTER SKY Series, this pilot’s watch is designed for those who push beyond boundaries and perform on the global stage. It pays tribute to the U.S. Navy Flight Demonstration Squadron “Blue Angels,” renowned worldwide for their precision aerobatics.

No regular battery replacement is required.
Citizen’s proprietary Eco-Drive technology converts sunlight and even minimal indoor light into electrical energy, continuously powering the watch. Once fully charged, it runs for extended periods even in darkness.

Always maintains precise time.
By receiving standard radio signals transmitted from atomic clocks—accurate to one second in 100,000 years—this watch automatically adjusts the time and calendar across four global regions: Japan, China, the United States, and Europe.

Resistant to shocks and magnetism for reliable accuracy.
Citizen’s exclusive PerfeX technology integrates JIS Class 1 anti-magnetic resistance, shock detection, and automatic hand correction, preventing hand misalignment caused by impact or magnetic interference.

Product Specifications

Model Number: JY8078-52L
Caliber No.: U680

Movement: Eco-Drive (solar-powered)
Accuracy: ±15 seconds per month (without radio signal reception)
Power Reserve: Approx. 3.5 years (with power-save function activated)

Radio Signal Reception: Japan / China / USA / Europe

Weight: 189 g
Thickness: 14.5 mm
Case Size: 45.4 mm (width)

Case Material: Stainless steel
Case Finish: Partial blue-tone plating

Band Material / Type: Stainless steel
Clasp: Triple-fold push-button clasp
Band Width: 22.0 mm
Adjustable Wrist Size: 128–200 mm

Glass: Sapphire crystal with anti-reflective coating
Water Resistance: 20 ATM (200 meters)
Magnetic Resistance: JIS Class 1

Design Features:

• Luminous hands and indexes

• Aviation slide rule bezel

Functions:

• Power reserve indicator

• Charge warning function

• Overcharge prevention function

• Power-save function

• Approx. 3.5 years of operation on full charge (with power save)

• Multi-band radio-controlled timekeeping (Japan, China, USA, Europe)

• Scheduled reception

• Manual reception

• Perpetual calendar

• LED display

• 24-hour display

• 12/24-hour display switching

• 1/100-second chronograph (up to 24 hours)

• World time (43 time zones)

• Coordinated Universal Time (UTC) display

• Selectable city display

• Daylight saving time function

• Dual time function

• World calendar

• Local time function

• PerfeX Multi 3000 (JIS Class 1 anti-magnetic, shock detection, automatic hand correction, four-region radio reception)

• World time alarm

• Timer