LUNA PROGRAM TECHNOLOGY: The world's first movement (Cal. H874) that automatically calculates the moon phase based on the date received by radio signals. Astronomical precision on your wrist.

SUPER TITANIUM™ & DURATECT: Made from Citizen's exclusive Super Titanium with Duratect coating. It is 5 times harder than stainless steel, hypoallergenic, corrosion resistant and surprisingly lightweight (you'll hardly feel you're wearing it).

GLOBAL ATOMIC PRECISION: Radio-controlled watch that automatically synchronises with atomic clock towers in 4 global regions (Japan, China, USA, Europe). Accurate to the millisecond, wherever you are.

MADE IN JAPAN: Assembled and manufactured entirely in Japan, ensuring the highest standards of quality control and luxury finishes.

SUPREME CLARITY SAPPHIRE CRYSTAL: Sapphire crystal with high transparency anti-reflective coating. Total scratch resistance and perfect dial visibility from any angle.

The Citizen Attesa (BY1001-66E) is a JDM (Japanese Domestic Market) model sold internationally as a high-end product. It's not just a pretty watch; it's a technological beast.

• Key difference: It is ‘Made in Japan’, it is made of Super Titanium (not steel) and it has the ‘Moon Program’ (calculates the exact moon phase via radio control, something unique in the world).

Option A (Technical and Complete): Citizen Attesa “Moon Programme” | Radio-Controlled Super Titanium Moon Phase Watch | Eco-Drive & Sapphire | Made in Japan - BY1001-66E

Option B (Sophisticated): Citizen Attesa Moon Phase - Radio-Controlled Titanium Edition | Calibre H874 with Automatic Moon Phase | BY1001-66E

• ‘LUNA PROGRAM’ TECHNOLOGY: The world's first movement (Cal. H874) that automatically calculates the moon phase based on the date received by radio signals. Astronomical precision on your wrist.
• SUPER TITANIUM™ & DURATECT: Made from Citizen's exclusive Super Titanium with Duratect coating. It is 5 times harder than stainless steel, hypoallergenic, corrosion resistant and surprisingly light (you'll hardly feel you're wearing it).
• GLOBAL ATOMIC PRECISION: Radio-controlled watch that automatically synchronises with atomic clock towers in 4 global regions (Japan, China, USA, Europe). Accurate to the millisecond, wherever you are.
• MADE IN JAPAN: Assembled and manufactured entirely in Japan, ensuring the highest standards of quality control and luxury finishes.
• SUPREME CLARITY SAPPHIRE CRYSTAL: Sapphire crystal with high transparency anti-reflective coating. Total scratch resistance and perfect dial visibility from any angle.

The Citizen Attesa BY1001-66E is the culmination of decades of Japanese engineering. Designed for the man who demands cutting-edge technology without compromising on elegance, this model redefines what an analogue watch can do.

Astronomical Engineering: Moon Program More than just a decoration, this watch's Moon Phase complication is intelligent. Thanks to its ‘Moon Program’ technology, the watch calculates the exact phase of the moon based on the date and the radio signal received, even allowing you to switch the display between the North and South hemispheres.

Space Age Materials Forget the weight of steel. The case and bracelet are forged from Super Titanium™, protected by Duratect surface hardening technology. The result is an extremely lightweight watch that is soft to the touch and resistant to scratches from everyday use.

Always on Time, Always Charged Equipped with the Eco-Drive movement, it is powered by any light source, eliminating the need to change batteries. Its global radio synchronisation ensures that, wherever you travel, your watch will always show the perfect time.

Caliber No. H874

Maximum autonomy when fully charged

(under normal conditions of use) Approximately 6 months

Eco-Drive movement

Signal reception Global radio controlled

Strap Titanium

Water resistance Water resistant to 10 bar

Thickness 10.8 mm

Case size

41.5 mm

Case Titanium

Crystal Sapphire crystal (anti-reflective coating)

Warranty 3-year warranty

Specifications

Super TitaniumTM

Duratect

Automatic moon phase calculation function

Moon phase display change function between the northern and southern hemispheres

Dual moon phase display

24-hour, date and day display

Eco-Drive (recharges from any light source, no need to replace the battery periodically)

Insufficient charge warning function

Overcharge prevention function

Perpetual calendar

Power reserve level indicator

Global radio controlled

World time with 24 time zones

Summer time (on/off)

Made in Japan