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Citizen Radio Controlled BY1018-80X Tsuki-yomi Watch

  • Citizen Radio Controlled BY1018-80X Tsuki-yomi Watch

Titanium radio controlled watch with moonphase

£635.- Incl 20% vat
● In stock
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  • Free delivery on watches above £84
  • 60-day return period
  • Official dealer of Citizen
Orders before 17:00 are shipped today!

Product description

This Citizen watch has a case made of Super Titanium with a diameter of 43 mm and is fitted with a Super Titanium strap. Inside the case lies a Citizen movement and the watch features a Sapphire crystal.

The watch is 10ATM. This means the watch is suitable for swimming. The watch comes with 2 Year Warranty.

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Specifications

Ean 4974374338150
Diameter 43 mm
Water Resistant 10 Bar (Swim)
Warranty 2 Year Warranty
Free 1 year extra warranty on Watch.co.uk

Functions

Time hours - Analogue hand
Calendar Date - Window
Alarms and notifications Power reserve indicator - Dial
General information
Ean 4974374338150
Brand Citizen
Series Radio Controlled
Name Tsuki-yomi
Year 2023 Fall / Winter
Display Type analog
Swiss Made No
Water Resistant 10 Bar (Swim)
Dial colour Red
Hand colors (h-m-s) Silver, Silver, White
Case information
Case code 0057T04
Diameter 43 mm
Case Thickness 10.8 mm
Material Super Titanium
Case Shape Round
Case colour Silver
Back case material Super Titanium
Back Case Snap on
Material crystal Sapphire
Crown Pull crown
Movement information
Movement part nr. H874 ( See specifications )
Movement Brand Citizen
Swiss movement No
Display Type analog
Mechanism Solar Quartz
Battery Rechargable solar battery
Power reserve 2.5 year
Hackable YES
Skeletonized No
Strap information
Strap material Super Titanium
Material type Super Titanium
Strap Type Link bracelet
Strap width 22 mm
Lug width 22 mm
Strap width at the clasp 18 mm
Strap colour Silver
Clasp Type Deployment clasp with push buttons
Clasp colour Silver
Custom sizing? YES
Mount type Push pins
Straight strap mount YES
Suitable for wrist size 160 mm - 220 mm
Original strap Strap Citizen 59-00585-01

Print & Fit

Wondering how the watch fits your wrist? Use the print and fit function!

Time
hours Analogue hand
minutes Analogue hand
Seconds Analogue hand
24-HR Indicator Analogue dial
Moon Phase Analogue
Automatische aanpassing van de tijd Radio controlled
Calendar
Date Window
Day Dial
Perpetual Calendar
Alarms and notifications
Power reserve indicator Dial

User experiences

  1. "Moon phase display, the 24hr AM/PM hand, and the bracelet"
    "Moon phase display, the 24hr AM/PM hand, and the bracelet"
    Nick Lewis · 30 oktober 2025

    The Tsuki-Yomi A.T. is a watch that I bought to prove that quartz is cool. It succeeds in every way in doing this. I am a sucker for accuracy, so to have a watch that automatically syncs up every night (which it does, every night without fail) is very important to me. The only important thing to note is that Citizen seem to be pretty bad when it comes to the colour accuracy of their advertising images. The red dial is only even slightly red when the light hits it in a very specific way. To me, the reality is better as one of my biggest concerns was that the bright red dial shown in the pictures could prove to be too distracting. While I am happy with the product itself, it's important to be aware of the difference between advertising and reality. The watch itself packs in as much information as possible, but never feels cluttered or hard to read. Beautifully designed, a masterpiece of engineering, and proves that quartz can be cool.

    • The shiny parts of the bracelet adds flair without being too distracting or flashy
    • The watch is light (thanks to its titanium case) and comfortable to wear
    • Guaranteed to be the most accurate clock in any room
    • The lume is slightly too weak to be useful

    The Tsuki-Yomi A.T. is a watch that I bought to prove that quartz is cool. It succeeds in every way in doing this. I am a sucker for accuracy, so to have a watch that automatically syncs up every night (which it does, every night without fail) is very important to me. The only important thing to note is that Citizen seem to be pretty bad when it comes to the colour accuracy of their advertising images. The red dial is only even slightly red when the light hits it in a very specific way. To me, the reality is better as one of my biggest concerns was that the bright red dial shown in the pictures could prove to be too distracting. While I am happy with the product itself, it's important to be aware of the difference between advertising and reality. The watch itself packs in as much information as possible, but never feels cluttered or hard to read. Beautifully designed, a masterpiece of engineering, and proves that quartz can be cool.

    • The shiny parts of the bracelet adds flair without being too distracting or flashy
    • The watch is light (thanks to its titanium case) and comfortable to wear
    • Guaranteed to be the most accurate clock in any room
    • The lume is slightly too weak to be useful
Citizen Radio Controlled BY1018-80X Tsuki-yomi Watch