Citizen
Citizen Chronomaster
Some quick numbers to note: according to the Contrôle Officiel Suisse des Chronomètres (COSC), mechanical tickers are considered to be highly precise when they maintain a rate of −4/+6 seconds per day. While the typical quartz timepiece maintains a ±1 second a day average and good quartz timepieces make ±15 seconds a month, by COSC standards, a quartz chronometer holds a requirement of ±25.55 seconds a year. Why are we referencing all these numbers? Because Citizen’s Chronomaster timepieces are accurate to ±5 seconds a year. That’s over five times more precise than international standards require.
Japanese Mastery
It’s easy to brush aside quartz timekeepers as being digital machines, but it’s not quite as simple as that. Quartz oscillators have to be carefully tuned and designed so that the crystal vibrates at exactly 32,768Hz (a factor of two that can then be digitally divided to a single count a second). It’s also how some rare quartz timepieces have seemingly sweeping seconds hands — instead of counting down to a single count a second, they do two, four or eight, and thus the hand moves incrementally. Conversely, the rare mechanical complication that is the deadbeat seconds is an everyday appearance on a quartz watch.
Accuracy performances aside, it’s what else is present within the Chronomaster AQ 4020-54Y that lights this watch up. To highlight its Japanese origins, Citizen has used washi paper on its dial. Washi paper, a hand-processed traditional Japanese paper-making craft, is produced using the inner bark from three types of Japanese flora and is recognised as a UNESCO cultural heritage. It’s still found today in various Japanese traditions and is used internationally in book mending and conservation. It’s a hardier paper fibre and Citizen has found a way to treat it and use it as a dial.
Movement
Quartz Eco-Drive A060; hours, minutes and seconds; perpetual calendar; up to 1.5-year power reserve
Case
39mm; Super Titanium; water‑resistant to 100m
Strap
Super Titanium bracelet
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