This SEIKO Radio Wave Control is a practical titanium quartz wristwatch featuring a black dial, applied hour markers, and a lightweight silver-tone case and bracelet. Its restrained three-hand layout is complemented by radio-controlled time correction and a robust 10 BAR water-resistance specification. Characteristic of SEIKO’s early-2000s radio-controlled watches, this model combines a battery-powered quartz movement with lightweight titanium construction. The 5B21-0AB0 case series is associated with models sold around 2004 and the following years. ━━━━━━━━━━━━━━━━━━ Specifications　WATCH ━━━━━━━━━━━━━━━━━━ Case Diameter: Approximately 41.1 mm Case Thickness: Approximately 9.9 mm Lug Width: Approximately 19.6 mm Wrist Size: Up to approximately 18 cm Movement: SEIKO Cal. 5B21 battery-powered quartz with radio-controlled time correction, 10 jewels Material: Titanium case and bracelet Water Resistance: 10 BAR Origin: Japan The watch measures approximately 41.1 mm in case diameter and 9.9 mm in thickness, with a lug width of approximately 19.6 mm and fitting a wrist of up to approximately 18 cm. The watch is currently running. Signs of use consistent with prior ownership are present, including surface scratches and rubbing to the titanium case, bezel, and bracelet. Wear is particularly visible around the bezel. The black dial remains comparatively well preserved, and no major cracks or deep damage to the crystal are apparent from the available inspection. This is a radio-controlled watch. Please note that the radio signal reception function may depend on the region or country. This Japan-market model is designed to receive the Japanese JJY standard time signal, and automatic reception may therefore not function outside the supported reception area. The watch can still be used with manual time setting where radio reception is unavailable. A distinctive piece suitable for collectors and enthusiasts of Japanese quartz technology and earlier-generation SEIKO radio-controlled watches. Shipping is from Japan, primarily via DHL, FedEx, or Japan Post. Depending on the buyer’s country, import duties or consumption tax may apply and are the responsibility of the buyer. Please note that courier collection is not available on weekends, so shipments are made on weekdays only. --- **Notice for EU Buyers** From July 1, 2026, shipments to EU countries may be subject to additional import-related charges, including customs processing fees, handling fees, import duties, VAT, or other customs-related charges, depending on the destination country and shipping carrier. These charges are determined by local customs authorities and/or the shipping carrier and are the buyer's responsibility. Please check your local import regulations before bidding or purchasing.