{"product_id":"citizen-promaster-bn0231-01l-eco-drive-diver-blue-mens-watch","title":"CITIZEN PROMASTER BN0231-01L Eco-Drive Diver Blue Men's Watch","description":"\u003cp data-start=\"280\" data-end=\"730\"\u003e\u003cstrong data-start=\"280\" data-end=\"295\"\u003eDescription\u003c\/strong\u003e:\u003cbr data-start=\"296\" data-end=\"299\"\u003eThe BN0231-01L from the \u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eCITIZEN\u003c\/span\u003e\u003c\/span\u003e PROMASTER series is a professional-grade dive watch that combines robust construction with a refined blue dial aesthetic. Designed to meet ISO diver’s standards, this model delivers high reliability under extreme conditions while maintaining a clean and highly legible display. The bold case structure and unidirectional bezel emphasize its purpose-built functionality.\u003c\/p\u003e\n\u003cp data-start=\"732\" data-end=\"1089\"\u003ePowered by \u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eEco-Drive\u003c\/span\u003e\u003c\/span\u003e technology, the watch converts light into energy, eliminating the need for regular battery replacement. With 200-meter water resistance and durable materials, it is built for both underwater performance and everyday wear. The BN0231-01L offers a balance of professional capability and long-term practicality.\u003c\/p\u003e\n\u003chr data-start=\"1091\" data-end=\"1094\"\u003e\n\u003cp data-start=\"1096\" data-end=\"1119\"\u003e\u003cstrong data-start=\"1096\" data-end=\"1118\"\u003eKey Specifications\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul data-start=\"1120\" data-end=\"1754\"\u003e\n\u003cli data-start=\"1120\" data-end=\"1194\"\u003eCase: approx. 44 mm diameter, approx. 12 mm thickness; stainless steel\u003c\/li\u003e\n\u003cli data-start=\"1195\" data-end=\"1235\"\u003eBezel: Unidirectional rotating bezel\u003c\/li\u003e\n\u003cli data-start=\"1236\" data-end=\"1267\"\u003eBand: Urethane strap, black\u003c\/li\u003e\n\u003cli data-start=\"1268\" data-end=\"1309\"\u003eWater resistance: 200 m (ISO diver’s)\u003c\/li\u003e\n\u003cli data-start=\"1310\" data-end=\"1353\"\u003eMovement: Eco-Drive quartz calibre E168\u003c\/li\u003e\n\u003cli data-start=\"1354\" data-end=\"1418\"\u003eBattery\/Power: Light-powered; approx. 6 months power reserve\u003c\/li\u003e\n\u003cli data-start=\"1419\" data-end=\"1450\"\u003eAccuracy: ±15 seconds\/month\u003c\/li\u003e\n\u003cli data-start=\"1451\" data-end=\"1486\"\u003eDisplay: Analog (3-hand + date)\u003c\/li\u003e\n\u003cli data-start=\"1487\" data-end=\"1514\"\u003eFunctions: Date display\u003c\/li\u003e\n\u003cli data-start=\"1515\" data-end=\"1582\"\u003eSpecial features: ISO-certified diver’s watch, screw-down crown\u003c\/li\u003e\n\u003cli data-start=\"1583\" data-end=\"1627\"\u003eIllumination: Luminous hands and markers\u003c\/li\u003e\n\u003cli data-start=\"1628\" data-end=\"1659\"\u003eAdditional: Mineral crystal\u003c\/li\u003e\n\u003cli data-start=\"1660\" data-end=\"1699\"\u003eOrigin: Japan \/ international model\u003c\/li\u003e\n\u003cli data-start=\"1700\" data-end=\"1723\"\u003eWarranty: 1–2 years\u003c\/li\u003e\n\u003cli data-start=\"1724\" data-end=\"1754\"\u003eRelease date: Approx. 2020\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1756\" data-end=\"1759\"\u003e\n\u003cp data-start=\"1761\" data-end=\"2040\"\u003e\u003cstrong data-start=\"1761\" data-end=\"1779\"\u003eKey Highlights\u003c\/strong\u003e:\u003cbr data-start=\"1780\" data-end=\"1783\"\u003eThe BN0231-01L stands out as a reliable ISO-certified diver’s watch within the \u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eCITIZEN\u003c\/span\u003e\u003c\/span\u003e PROMASTER lineup. Its bold case design and deep blue dial provide strong visual identity while maintaining excellent underwater readability.\u003c\/p\u003e\n\u003cp data-start=\"2042\" data-end=\"2303\"\u003ePowered by Eco-Drive technology, this watch eliminates the need for battery changes by converting light into energy. This feature significantly enhances long-term usability and reduces maintenance requirements, making it ideal for both diving and everyday wear.\u003c\/p\u003e\n\u003cp data-start=\"2305\" data-end=\"2556\"\u003eWith 200-meter water resistance and a unidirectional bezel, it is built for serious underwater use. At the same time, its balanced design and comfortable strap make it suitable for daily wear, appealing to users who want both function and versatility\u003c\/p\u003e","brand":"CITIZEN","offers":[{"title":"Default Title","offer_id":47479714906367,"sku":"1133007","price":60500.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0720\/0561\/5871\/files\/hit-market_01133007_i_20250327120556.jpg?v=1762464425","url":"https:\/\/japanheartfulstore.com\/products\/citizen-promaster-bn0231-01l-eco-drive-diver-blue-mens-watch","provider":"Japan Heartful Store","version":"1.0","type":"link"}