[Introduction] Citizen Eco-Drive E610-S104831 is a multifunction chronograph wristwatch equipped with radio-controlled timekeeping and solar charging technology. The black dial features multiple sub-dials for world time, chronograph, alarm, and calendar functions, along with a tachymeter bezel. As part of the Eco-Drive series, it is powered by light and does not require regular battery replacement under normal use. [Historical & Collector Value] Citizen’s Eco-Drive technology represents a significant development in quartz watchmaking, utilizing light as a power source to eliminate routine battery changes. The E610 caliber combines solar charging with radio-controlled time adjustment, offering practical accuracy and convenience. This model reflects Citizen’s focus on advanced functionality and durable construction, making it appealing to collectors and users seeking a reliable Japanese multifunction timepiece. Specifications ◇ Brand: Citizen ◇ Model: E610-S104831 ◇ Movement: Eco-Drive (Solar-powered quartz, Cal. E610) ◇ Functions: Radio-controlled timekeeping, chronograph, world time, alarm, date display ◇ Dial Color: Black ◇ Bezel: Tachymeter scale ◇ Case Material: Stainless steel ◇ Bracelet: Stainless steel ◇ Case Diameter: 44 mm ◇ Wrist Size: Approx. 18 cm ◇ Water Resistance: 10 BAR ◇ Crystal: Sapphire crystal ◇ Country of Manufacture: Japan (movement) ・Condition The watch shows signs of normal use, including light surface scratches on the case and bracelet consistent with regular wear. The dial and hands appear well preserved. Please refer to the photos for detailed cosmetic condition. ・Service History Operational checks have been performed and the watch is functioning at the time of listing. As this is a solar-powered Eco-Drive model, it operates by light charging. Future maintenance may be required depending on usage and buyer standards. ・Shipping & Customs The watch will be shipped from Japan and carefully packed to ensure safe delivery. International shipping is available. Please note that any customs duties, VAT, or import taxes are the responsibility of the buyer.