The Citizen Calendar Eco-Drive Watch, model number BU2021-51L, is a stylish and versatile timepiece suitable for various occasions. With its sleek stainless steel case and bracelet band, this watch features a classic round shape with a gold bezel and case color. It boasts a quartz movement with 21 jewels, providing accurate timekeeping. The watch is water-resistant up to 50m and has features such as a date indicator, chronograph, and luminous hands for added functionality. The Eco-Drive technology allows the watch to be powered by light, eliminating the need for battery replacements. Ideal for men, this luxury dress/formal watch is a timeless accessory for any wardrobe.