NOS Rare Vintage Seiko C439-5010 Calculator Keyboard Men’s Digital Watch JDM 80s

Up for sale is an ultra-rare vintage Seiko C439-5010 men’s digital calculator keyboard watch, made in Japan for the Japan Domestic Market (JDM) in the early 1980s. This iconic Seiko model showcases the brand’s pioneering digital technology from the era, featuring a full calculator keypad, multi-function digital display, and precise quartz movement—an advanced and highly collectible design from Seiko’s golden age of innovation. This example is new old stock (NOS) and in near mint condition, showing only the most minor signs of handling and long-term storage from over the years. The watch is in full working order, and all features and functions operate properly, including timekeeping, calculator, alarm, and calendar modes. All parts are 100% original, and the set is complete with all factory accessories, including: • Original Seiko presentation box • Instruction manual (Japanese) • Limited one-year warranty booklet • Original Seiko hang tag • Seiko stylus pen (still sealed in original plastic) The original protective plastic remains on the buckle, and the case back still retains its original “PASSED JWCII” inspection sticker, confirming its untouched state. This vintage timepiece has been carefully stored since the 1980s and has never been worn or used beyond light handling. An exceptional and nearly impossible-to-find full set, perfect for serious Seiko collectors and vintage digital watch enthusiasts. Key Details: • Model: Seiko C439-5010 • Module: C439 • Movement: Quartz Digital • Functions: Calculator, Alarm, Perpetual Calendar, Stopwatch, Time/Date • Case Material: Stainless Steel • Origin: Japan Domestic Market (JDM) • Condition: New Old Stock (NOS) – Near Mint, with only minimal signs of storage and handling • Accessories: Original box, instruction manual, warranty card, hang tag, stylus pen • Year: Early 1980s A vintage Seiko digital collectible in extraordinary preserved condition—virtually impossible to find complete and this well-kept today. Ships carefully. Feel free to message me with any questions.