Citizen Calendrier BU0057-54E 44mm – black ion-plated Eco-Drive multifunction with day-date and 24-hour indicator.
Stealth aesthetics meet sustainable timekeeping in this timepiece, where black ion plating flows seamlessly across case, bracelet, and dial for monochromatic depth. Eco-Drive technology converts any light source into stored energy, eliminating battery replacement indefinitely, while multiple subdials track day, date, and 24-hour time. At 44mm diameter with 13mm thickness, the proportions deliver commanding wrist presence suited for professional and casual wear.
| Benefits |
| Eco-Drive technology harnesses light energy to power the watch indefinitely without battery maintenance |
| Black ion-plated finishing creates cohesive stealth aesthetic while providing hardened surface protection against wear |
| Multifunction display tracks day, date, and 24-hour time through dedicated subdials for comprehensive timekeeping |
| Key features |
| Day and date complications eliminate calendar guesswork through dedicated windows integrated within dial layout |
| 24-hour subdial maintains military time reference for international coordination and travel applications |
| Black-on-black aesthetic creates dimensional depth through tonal variation and surface treatments |
| Mineral crystal provides scratch resistance to protect dial surface |
| Who it's for |
| Individuals seeking sustainable multifunction watch with stealth styling and Japanese precision engineering |
| Those who value comprehensive time tracking in refined black aesthetic for versatile professional wear |
| How to wear |
| Expose dial to natural or artificial light regularly to maintain continuous Eco-Drive operation |
| Read day indication through dedicated window, date via separate display, 24-hour time on subdial |
| Adjust fold-over clasp to secure fit that balances security with comfort during extended wear |
| Specs |
| Movement |
Eco-Drive, solar-powered quartz with multifunction capability |
| Case |
44mm diameter, 13mm thickness, black ion-plated stainless steel, round profile |
| Crystal |
Mineral with scratch resistance |
| Bracelet |
Black ion-plated stainless steel with fold-over clasp |
| Dial |
Black with day-date windows and 24-hour subdial |
| Water resistance |
50 meters, 5 ATM |
| Model |
BU0057-54E |
| UPC |
13205138409 |
