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Citizen Tsuki-yomi A-T

Citizen Tsuki-yomi A-T

SolarTitanium

Ref. BY1010-57L

Case size: 43mmMovement: H874

The Citizen Tsuki-yomi A-T, reference BY1010-57L, offers world time in a 43 mm round Super Titanium case rated to 100 metres, with 22 mm lugs. A perpetual calendar shares the blue dial with weekday and date indications. Luminous hands and indices appear beneath sapphire on a design inspired by the moon's surface. The case measures 10.87 mm thick beside a titanium bracelet. The bracelet closes with a folding clasp, while a window displays the moon phase. Calibre H874 is an Eco-Drive solar movement charged by light that never needs a battery.

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Last updated 20 Oct 2026Suggest a correction

TECHNICAL SPECIFICATIONS

GENERAL

Gender

Men

CASE

Diameter

43mm

Thickness

10.87mm

Lug Width

22mm

Case Material

Titanium

Water Resistance

100m

Crystal

Sapphire Crystal

MOVEMENT

Movement Type

Solar

Caliber

H874

DIAL

Dial Color

Blue

BRACELET/STRAP

Bracelet/Strap

Titanium

Clasp Type

Fold Clasp

FEATURES & COMPLICATIONS

DateLuminous handsLuminous indicesMoon phasePerpetual calendarSolar watchWeekdayWorld time watch

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