Thank you for viewing. This is a vintage model equipped with Seiko's groundbreaking "KINETIC" mechanism. It operates by generating power from the movement of the wrist, a rare piece that combines the accuracy of quartz with the enjoyment of automatic winding. 【Maintenance Details】 Secondary Battery Replacement: Performed in January 2026. Replaced with a new genuine Seiko secondary battery (worth 2,000 yen). You can use it with peace of mind for a long time. Cleaning: Disinfected with alcohol. Exterior Polishing: Lightly polished to restore shine. Waterproofing: Gaskets replaced with new ones and silicone grease applied. 【Product Condition】 Operation: Operates normally. Power generation and storage functions are also good. Appearance: Both the case and glass are in relatively clean condition, but due to being a vintage item, there are minor scratches and age-related deterioration from use. Belt: Seiko genuine belt. Please check the images for wear and tear due to aging. ※ Please refrain from purchasing if you are concerned about minor scratches or are sensitive to used/antique items. 【Detailed Information】 Model Number: 5M22-7A80 Brand: Seiko (SEIKO) Drive System: Kinetic (Power Generating Quartz) 【Reliable Transactions & Other Information】 Authenticity Guarantee: We guarantee that this is a genuine product. If it is found to be a counterfeit or fake, we will accept returns and refunds. Price Negotiation: We also accept price negotiations. Please feel free to comment. Welcome International Buyers: We welcome purchases from overseas through proxy services such as Buyee! Thank you.