Watch Almanac
Citizen

Tsuki-yomi A-T

Ref. BY1010-57L

Case diameter
43 mm
Manufacturer spec
Lug-to-lug
—
Not published
Thickness
—
Not published
Lug width
22 mm
Manufacturer spec

Retail price $895 (US, Oct 2026)

We have not verified this watch’s lug-to-lug yet, so we can’t draw it on a wrist. Case diameter alone is a poor guide to fit.

How the Tsuki-yomi A-T wears

Its 22 mm lug width is one of the most common strap sizes; 56 other watches here share it, so aftermarket straps are easy to find.

Specifications

Reference
BY1010-57L
Collection
Tsuki-yomi
Status
In production
Case material
Super Titanium
Crystal
sapphire
Water resistance
100 m
Bezel
fixed
Dial
blue
Strap / bracelet
Super Titanium bracelet, fold-over clasp with push buttons
Weight
105 g
Style
Everyday, Sport

Movement

Caliber
Citizen H874
Type
solar
Accuracy
radio-controlled (atomic timekeeping)

Takes 22 mm straps. See other 22 mm watches and straps.

Same 22 mm lug width

All 22 mm watches

These take the same straps as the Tsuki-yomi A-T.

Sources