[Worldwide limited edition of 1,900 pieces] Citizen Atessa CC4078-51E｜LIGHT in BLACK Eco-Drive 50th Anniversary x Duratect Amber Yellow x Cal.F950 GPS satellite radio waves, top of black and gold

Citizen Atessa ACT Line will be a limited edition of 1,900 pieces worldwide scheduled to be released on June 4, 2026.CC4078-51Ewill appear.
This model will be released as part of the 2026 edition of the limited collection "LIGHT in BLACK" commemorating the 50th anniversary of the birth of the photovoltaic technology "Eco-Drive." With the theme of "light and time," this is a special piece finished in black and gold, a coloring reminiscent of the original LIGHT in BLACK.

The biggest highlight is “Duratect Amber Yellow,” which is the first color used by Atessa. Amid the black DLC (diamond-like carbon) coating, the mirror-finished bezel shines elegantly with an amber yellow color—its expression has a depth that cannot be conveyed in photos. The dial uses a special technique of layering inkjet printing to create a three-dimensional design with an uneven feel, and in conjunction with the 50th anniversary, a one-of-a-kind face is created by combining patterns from five different angles. This is a model where "meaning" resides in the beauty of the watch.

Limited to 1,900 pieces worldwide—The contrast of DLC and amber yellow gives off a quiet and intimidating feeling.

Approximately 111g of super titanium rests on your arm—a contrast between its lightness and high density.

5 patterns x 3D dial - A design suitable for the 50th anniversary that changes its expression by reflecting light.

Amber yellow x yellow gold indexes—the golden rule of LIGHT in BLACK.

Dual spherical sapphire glass x clarity coating—designed for ultimate clear visibility.

■ Main features

• Limited to 1,900 pieces worldwide:"LIGHT in BLACK 2026" collection commemorating the 50th anniversary of Eco-Drive. A special and rare piece
• Atessa's first use of "Duratect Amber Yellow":New Duratect surface treatment applied to super titanium. The mirror-finished bezel shines elegantly in amber yellow.
• Duratect DLC (black color):DLC coating applied to the entire case provides a deep black color and high scratch resistance.
• Three-dimensional 5-pattern dial:A pattern with five different angles symbolizing the "50th anniversary" is expressed using layered inkjet printing technology. A three-dimensional effect that shines beautifully due to the reflection of light
• Yellow gold-colored indexes, subdials, and city name notation:A world view of LIGHT in BLACK where amber yellow and yellow gold stand out in black.
• Equipped with Cal.F950 (GPS satellite radio solar):Obtains location and time information from GPS satellites in 4 areas around the world. Automatically correct the time no matter where you are in the world. Accuracy is ±5 seconds/month (when not receiving)
• Approximately 5 years of operation during power save:Long-life design of photovoltaic eco-drive
• Super titanium (case/band):Citizen's proprietary material boasts approximately 40% lighter weight than stainless steel and a surface hardness more than 5 times greater. Metal allergy resistant
• Dual spherical sapphire glass (clarity coating):Spherical processing on both inside and outside + clarity coating to increase light transmittance to minimize reflections
• 1/20 second chronograph (24 hour total):Chronograph function allows for highly accurate time measurement
• Double direct flight:Unique feature that allows you to switch to local time overseas with simple operations
• World time function (39 time difference):Displays the time in major cities around the world. Also supports dual time home/local time switching
• Perfex (JIS class 1 magnetic resistance x shock detection x automatic needle correction):Citizen's unique technology that prevents needle displacement due to magnetism and impact
• Fit adjuster:Mechanism that allows you to finely adjust the length of the band
• Perpetual Calendar Day & Date Alarm:Fully equipped with practical functions
• 10 ATM water resistant/Made in Japan:Guaranteed waterproof performance and quality
• 1% for the Planet compatible/Eco Mark certified:Consistently demonstrate your commitment to sustainability

■Specs

■Historical selection of “Atessa’s first Duratect Amber Yellow”

Duratect is Citizen's unique surface hardening technology that achieves high scratch resistance and a beautiful surface finish when applied to super titanium. CC4078-51E is the first Atessa to use "Duratect Amber Yellow," which is an amber yellow coating applied to Duratect. Against the background of the entire DLC black case, only the mirror-finished bezel is clad in a warm golden color of amber yellow—this calculated two-layer expression embodies the essence of the collection's name, LIGHT in BLACK.

The index on the dial, the subdial at 6 o'clock, and the city name on the sapphire bezel all use yellow gold, and the color palette of black, amber yellow, and yellow gold harmonizes perfectly within this watch.

■ Cal.F950 x GPS satellite radio waves—“Keep accurate time around the world”

Cal.F950 is an Eco-Drive GPS satellite radio movement that obtains position and time information from GPS satellites and automatically adjusts to the correct time no matter where you are in the world. It has overwhelming versatility, allowing you to adjust the time even in places where standard terrestrial radio waves cannot reach, as long as there is sky. The precision design is ±5 seconds/month even when not receiving data, and is a specification that can be trusted by those on the front lines of business.

The double direct flight function allows you to switch to local time overseas in two steps. World Time 39 When combined with time difference support and dual time function, it covers all the demands of global business people who want to manage multiple time zones at the same time.

■ “The pinnacle of materials”: super titanium and dual spherical sapphire

The super titanium used for the case and band is Citizen's proprietary material that is approximately 40% lighter than stainless steel and has a surface hardness more than five times that of stainless steel. At approximately 111g, it is surprisingly light considering its size, and is designed to not put any strain on your wrist even when worn for long periods of time. The fact that it is resistant to metal allergies is also an important safety factor as it will be used for a long time.

Dual spherical sapphire glass is used for the glass, and clarity coating is applied to both the inside and outside to maximize light transmittance. True to Citizen's slogan, ``The dial looks as if there is no glass,'' it provides clear legibility even under all kinds of ambient light.

■ Recommended for these people

• Those who have been waiting for Citizen Atessa LIGHT in BLACK collection
• For those who want to get a special bottle to commemorate the 50th anniversary of Eco Drive.
• Those who are attracted to Duratect Amber Yellow, which was first adopted by Atessa.
• For those who want to add a rare watch to their collection, limited to 1,900 pieces worldwide.
• Cal.F950 A business person who flies around the world using GPS satellite radio waves.
• Those considering color comparison with CC4077-71Z/CC4076-65A
• Those looking for a special gift for a promotion, anniversary, or turning point

■ Buyer's comment

When I first saw the actual CC4078-51E, I thought, "Is this what amber yellow means?" It's definitely better in real life than in the photo. The way the amber yellow bezel shines with a mirror finish amidst the solid feel of the black DLC is truly "light in the black." To commemorate the 50th anniversary, the 3D dial with 5 patterns engraved on it takes on a new look every time you change the angle. The power of Cal.F950's GPS satellite radio waves and this beauty coexist - I am convinced that the value conveyed by the number 1,900 worldwide is genuine.

— Nanapure Buyer Fujimuro

■ Purchase at each mall

■ Related model (Atessa LIGHT in BLACK)

• Atessa See list
• Citizen See list

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