Citizen
Citizen Calendrier World Time Eco-Drive Blue Dial Stainless Steel Men's Watch BU2021-51L 100M
SKU: BU2021-51L
GTIN: 13205110405
The Citizen Calendrier Eco-Drive BU2021-51L is a sophisticated world time timepiece that combines cutting-edge solar technology with refined craftsmanship. Designed for the modern traveler and professional, this men's watch features a striking dark blue sunray dial that radiates depth and elegance, housed within a robust 44mm stainless steel case. The signature Eco-Drive movement harnesses any light source to power the watch indefinitely, eliminating the need for battery replacements and embodying Citizen's commitment to sustainable innovation. With world time functionality across 24 cities, a 12/24-hour subdial, and clear day-date displays, this timepiece delivers exceptional utility for managing global schedules. Luminous hands ensure readability in low-light conditions, while 100-meter water resistance adds versatility for everyday activities and aquatic adventures.
Key Features
- Eco-Drive Technology: Light-powered movement requires no battery changes
- World Time Function: Displays time across 24 major cities worldwide
- Premium Construction: Full stainless steel case and bracelet for durability
- Multi-Function Dial: Day, date, and 12/24-hour subdials
- Luminous Hands: Enhanced visibility in low-light conditions
- Water Resistant: 100 meters (330 feet) for swimming and water sports
- Comfortable Sizing: 44mm case diameter balances presence with wearability
- Sapphire Crystal: Scratch-resistant mineral crystal protects the dial
- Professional Styling: Blue dial with silver-tone markers and hands
Technical Specifications
| Brand | Citizen |
| Model Number | BU2021-51L |
| Collection | Calendrier |
| Gender | Men's |
| Movement | Eco-Drive (Solar Quartz) |
| Case Diameter | 44mm |
| Case Shape | Round |
| Case Material | Stainless Steel |
| Estimated Weight | 165g |
| Crystal | Mineral Crystal |
| Dial Color | Blue Sunray |
| Band Material | Stainless Steel |
| Bracelet Type | Three-Link Bracelet |
| Clasp Type | Fold-Over Push Button |
| Band Width | 22mm (estimated) |
| Lug Width | 22mm (estimated) |
| Lugs Count | 4 |
| Crown Type | Push-Pull |
| Water Resistance | 100 Meters / 10 ATM / 330 Feet |
| Functions | World Time (24 Cities), Day-Date Display, 12/24-Hour Subdial, Luminous Hands |
| Power Reserve | Approximately 6 months (full charge) |
About Citizen Eco-Drive
Citizen's proprietary Eco-Drive technology is a revolutionary solar-powered movement system that converts any light—artificial or natural—into energy. This innovative approach eliminates the environmental impact of disposable batteries while ensuring your timepiece runs continuously with minimal maintenance. The Calendrier collection showcases Citizen's mastery of combining advanced functionality with timeless design, making it an ideal choice for discerning watch enthusiasts who value both performance and sustainability.