Presented for auction by Second Vintage The King Seiko line represents the pinnacle of Japanese mid-century horology, born from a fierce internal rivalry designed to push the absolute limits of mechanical precision and aesthetic perfection. This reference 5626-7111 is a masterful expression of Taro Tanaka’s legendary Grammar of Design, offering sharp, faceted geometry and a high-beat automatic caliber that rivaled the finest Swiss chronometers of its era. With its stunningly preserved sunburst dial and robust mechanical health, this timepiece is a definitive collector-grade example of Seiko’s golden age. Brand: Seiko Model: King Seiko Reference Number: 5626-7111 Serial Number: 311548 Movement: Automatic Caliber 5626B Dial: Silver sunburst with applied faceted indices, exceptionally clean condition Case Size: 36 mm (excluding the crown) Case Material: Stainless Steel Production Year: 1973 Condition: Excellent vintage condition with sharp case lines and a pristine dial Dial and Hands The silver sunburst dial is a masterclass in mid-century Japanese design, radiating from the center and catching the light beautifully at every angle. It features applied, faceted rectangular indices with crisp black inserts that perfectly match the sharp dauphine hands, ensuring immediate legibility and striking visual contrast. The dial furniture includes an applied Seiko logo in a classic serif typography at the twelve o'clock position and the applied KS medallion above the six o'clock marker, accompanied by the printed sans-serif automatic and hi-beat text, along with the Suwa factory symbol. A framed day-date aperture sits cleanly at the three o'clock position, offering both English and Kanji day wheels. Upon close inspection, the dial remains in exceptionally clean condition, devoid of any noticeable spots, staining, print loss, or moisture damage, presenting a remarkably well-preserved surface that honors its vintage pedigree. Case and Crystal The thirty-six millimeter stainless steel case strictly adheres to the iconic Grammar of Design principles, showcasing sharp, angular lugs with broad, flat surfaces and distinct transitions between brushed and polished finishes. The factory chamfers remain highly visible and defined, indicating careful preservation over the decades. The case flanks are strong, and the original KS-signed crown sits flush against the side, operating correctly. A clear crystal protects the dial, showing no significant scratches or visual distortions, allowing for an unimpeded view of the pristine dial below. The solid caseback features the deeply engraved Seiko KS text, water-resistant markings, reference numbers, and serial numbers, all remaining crisp and highly legible. Normal, honest signs of light handling wear are present on the case, consistent with a well-cared-for vintage timepiece. Movement Inside beats the highly esteemed Seiko Caliber 5626B, a twenty-five jewel automatic movement known for its hi-beat precision and robust architecture. The movement features a golden-lettered Seiko rotor and clean, well-preserved brushed bridges, showcasing the mechanical integrity of the Suwa factory's engineering. Exhibiting remarkable accuracy and consistency, performing brilliantly for a vintage timepiece. The timegrapher results indicate a strong performance of -8 to -10 seconds per day with strong amplitude. Strap The watch is fitted with a handsome black textured leather strap featuring contrasting white stitching, complementing the sharp monochrome aesthetic of the dial and case. It secures comfortably to the wrist with a classic stainless steel tang buckle. Condition This King Seiko is presented in excellent vintage condition. The dial is exceptionally well-preserved with no visible flaws, while the case retains its crucial factory geometry and sharp lug profiles without heavy polishing. The engraved caseback remains highly detailed, and the movement is remarkably clean, making this a prime example of Seiko's historic high-end catalog. Dimensions The case measures 36 mm in diameter excluding the crown, offering a classic and highly wearable vintage proportion that sits elegantly on the wrist. Remarks The 56KS series is widely regarded as one of the most reliable and aesthetically perfect expressions of the King Seiko lineage. The inclusion of the Kanji day wheel adds a layer of domestic Japanese market authenticity that vintage collectors highly desire, making this a versatile and historically significant daily wearer. History Introduced in the late 1960s and early 1970s, the King Seiko line was born from an internal rivalry within the Seiko corporation, pitting the Suwa and Daini factories against each other to produce the finest mechanical watches in the world. The 56KS family represented a leap in automatic winding technology and high-beat escapement design, cementing Seiko's reputation on the global stage. Today, these pieces are celebrated as masterpieces of horological design and mechanical endurance, remaining highly sought after by enthusiasts worldwide. Payment and Shipping Payment must be completed within 1–3 days after purchase. Your watch will be professionally and very securely packaged, and shipped with tracking and insurance for your peace of mind. We ship via fast express service, with typical delivery in 1–4 business days (destination dependent). Please review all photos carefully before bidding. We strive to photograph each watch from multiple angles for the most accurate representation. The photos form an important part of the description. As with all vintage watches, water resistance is not guaranteed. The watch will be delivered in fully functional, working condition. If you have any questions, feel free to contact us after the auction ends. / Second Vintage SKU: SEI-SKX-0001