Citizen uses a hardened titanium case, one that is developed internally. That’s over five times more precise than international standards require. The case of the Chronomaster AQ 4020-54Y is equally surprising. Why are we referencing all these numbers? Because Citizen’s Chronomaster timepieces are accurate to ±5 seconds a year. Description eBay Details Citizen Market Performance Of This Model Citizen Eco-Drive (AQ4020-54Y) Water Resistance: 100 meters Case Diameter: 37.5mm Case Material: Titanium The Citizen Eco-Drive (AQ4020-54Y) is a watch model from the Citizen brand and Eco-Drive collection. While the typical quartz timepiece maintains a ☑ second a day average and good quartz timepieces make ☑5 seconds a month, by COSC standards, a quartz chronometer holds a requirement of ☒5.55 seconds a year.
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. As a result, high-precision quartz timekeeping is making a strong comeback. This redefinition is in no small part due to the presence of smartwatches, which are driving forward digital timekeeping efforts. In recent days, however, there’s been increasing interest in redefining electronically assisted timekeeping – quartz-powered timekeepers are no longer simply the more accessible option. Best price from Japan on this Citizen AQ4020-54Y Chronomaster Eco-Drive that has the Tosa Washi paper white dial, Super titanium Duratect Case, sapphire glass (99% Clarity coating), also comes with Caliber A060. This AQ4020-54Y Chronomaster is a JDM (Japanese Domestic Market) watch model and it's now in our stock - ready to ship within 48 hours to any country.At Revolution, we’ll be honest in saying that we’re a tad biased towards mechanical watchmaking.
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