Citizen Men’s Eco-Drive Calendrier Classic Watch, 12/24 Hour

Product Overview

The Citizen Men’s Eco-Drive Calendrier Classic Watch seamlessly blends timeless elegance with modern functionality, making it a versatile companion for both professional and casual settings. Crafted for the discerning man who values precision and style, this watch features a striking blue dial housed in a durable stainless steel case, offering a refined look that transitions effortlessly from boardroom meetings to weekend outings. Powered by Citizen’s innovative Eco-Drive technology, it harnesses light—natural or artificial—to keep accurate time without the need for battery replacements. With its classic round silhouette and sophisticated silver-tone finish, this timepiece embodies understated luxury and reliable performance.

Key Features

• Eco-Drive Technology: This watch is powered by Citizen’s award-winning Eco-Drive system, which converts any light source into energy to fuel the watch. This eliminates the inconvenience and environmental impact of frequent battery changes, ensuring continuous operation as long as it’s exposed to light. Whether you’re indoors under office lighting or outdoors in natural sunlight, your watch remains fully charged and ready.
• Chronograph Functionality: Equipped with a precise chronograph feature, this watch allows you to measure elapsed time with accuracy down to the second. Ideal for timing workouts, cooking, or any activity requiring split-second precision, the sub-dials provide clear, easy-to-read measurements while maintaining the watch’s sleek aesthetic.
• 12/24-Hour Time Display & Day-Date Calendar: The dial includes both 12-hour and 24-hour time formats, catering to personal preference or international travel needs. Additionally, the day and date window offers at-a-glance convenience, helping you stay organized and punctual in your daily routine.
• Luminous Hands: Designed for visibility in low-light conditions, the watch features luminous hands that absorb light and glow in the dark. This ensures you can easily read the time during nighttime or in dimly lit environments without straining your eyes.
• Anti-Reflective Mineral Crystal: The watch face is protected by an anti-reflective mineral crystal, which reduces glare and enhances clarity under various lighting conditions. This durable crystal resists scratches and maintains a pristine appearance over time, preserving the watch’s elegant look.
• Deployment Clasp with Push Buttons: The stainless steel bracelet is secured with a deployment clasp that includes push-button release for easy and secure fastening. This design ensures a comfortable, adjustable fit while providing added safety against accidental opening.

Technical Specifications

• Model Number: BU2021-51L
• Collection: Men’s Classic – Calendrier
• Eco-Drive: Yes – Powered by light, no battery replacement needed
• Base Movement: 8729 – Reliable quartz movement for accurate timekeeping
• Clasp Type: Deployment Clasp with Push Buttons – Secure and easy to use
• Dial Color: Blue – Rich, sophisticated hue for enhanced visibility
• Case Material: Stainless Steel – Durable and corrosion-resistant
• Case Color: Silver-Tone – Classic metallic finish
• Case Shape: Round – Timeless and universally flattering design
• Case Width: 44mm – Bold presence on the wrist
• Case Length: 44mm – Balanced proportions for comfort
• Band Type: Bracelet – Integrated stainless steel links
• Band Color: Silver-Tone – Matches case for a cohesive look
• Band Material: Stainless Steel – Long-lasting and hypoallergenic
• Crystal Material: Anti-Reflective Mineral Crystal – Scratch-resistant and glare-free
• Water Resistance: 100M – Suitable for swimming and snorkeling

Benefits & Uses

This watch is ideal for professionals, travelers, and outdoor enthusiasts alike. Its water resistance up to 100 meters makes it suitable for swimming, showering, and water sports, while the luminous hands and chronograph ensure functionality in any environment. The day-date display keeps you organized, and the Eco-Drive technology means you’ll never worry about battery life. Whether worn daily or reserved for special occasions, this timepiece delivers reliability, style, and practicality in one elegant package.

As part of Citizen’s commitment to sustainability, this watch supports meaningful environmental partnerships. Citizen is the official timepiece partner of Disney parks and runDisney events, promoting adventure and conservation. The brand also collaborates with Everybody Solar to advance solar energy projects, American Forests to restore vital ecosystems, and Save the Beyond to highlight global environmental challenges. Wearing this watch means supporting a company dedicated to protecting the planet.

Why Choose This Product

The Citizen Men’s Eco-Drive Calendrier Classic Watch stands out for its perfect balance of classic design and advanced technology. With its light-powered movement, durable construction, and practical features like chronograph and luminous hands, it offers exceptional value and performance. Backed by a five-year limited warranty—extendable to six years with registration—this watch is a smart, sustainable investment for anyone seeking reliability and refined style. Citizen’s legacy of innovation and environmental stewardship makes this timepiece a meaningful choice for the conscious consumer.

Your Citizen Watch comes with a five-year, limited coverage. When you register your watch online or through our My Citizen App, you will receive an additional coverage year free, for a total of six years coverage. Setting instructions and manuals are available on the Citizen website or via the My Citizen App (iOS and Android) using the Movement Caliber Number on the caseback. Replacement straps and links may be available through Citizen’s self-service portal.

Is Discontinued By Manufacturer: No
Product Dimensions: 0.59 x 0.59 x 0.59 inches; 6.07 ounces
Item model number: BU2021-51L
Department: Mens
Batteries: 1 Lithium Ion batteries required. (included)
Date First Available: January 20, 2015
Manufacturer: Citizen Watch Company
ASIN: B00PXVU3JO
Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
Best Sellers Rank: #225,758 in Clothing, Shoes & Jewelry; #736 in Men’s Wrist Watches
Customer Reviews: 4.5 out of 5 stars (1,467)