Available now on auction by Second Vintage This Seiko Business-A is an exceptional example of refined Japanese design from the late 1960s. Originally marketed towards the rising professional class, this model combines a high jewel-count movement with a sleek, architectural case design that remains timeless today. With its hidden crown and substantial case presence, this piece represents a high-water mark for mid-century mechanical Seikos. Brand: Seiko Model: Business-A Reference Number: 8346-9000 Serial Number: 7103666 Movement: Caliber 8346A Automatic, 27 jewels Dial: Silver sunburst with day-date complication Case Size: 37 mm (excluding the crown) Case Material: Stainless Steel Production Year: 1967 Condition: Near-mint condition. Running within vintage tolerances, with timegrapher readings between -15 and -21 seconds per day which indicates healthy movement. Dial and Hands The silver sunburst dial is remarkably preserved, displaying a vibrant metallic sheen that catches the light beautifully. It features multifaceted applied block indices that are polished to a high shine, adding depth and texture to the face. The sharp dauphine hands are free of corrosion and provide excellent legibility. The day and date window at the 3 o'clock position is framed in steel, and the text "Business-A" and "Diashock 27 Jewels" remains crisp and black. The dial is flawless or nearly flawless, with no spotting or patina visible to the naked eye. Case and Crystal The stainless steel case features the distinctive "hidden crown" design, where the crown is recessed at the 4 o'clock position to maintain a perfectly symmetrical silhouette. The case geometry is outstanding, with sharp, unpolished lines on the lugs and bezel. The surfaces show only the absolute faintest of handling marks, consistent with a near-new presentation. The caseback engravings, including the model reference, serial number, and "Water Proof" designation, are deep and clearly legible. The crystal is clear and pristine. Movement Housing the high-grade Seiko Caliber 8346A, this automatic movement features 27 jewels and Diashock protection. This was a premium specification for the era, designed for longevity and accuracy. The movement presents cleanly and offers reliable vintage performance. Timegrapher results show the watch running between -15 and -21 seconds per day, indicating a healthy mechanical state. Strap The watch is paired with a classic brown leather strap featuring an alligator grain pattern. The strap complements the silver dial perfectly and is suitable for both formal and casual wear. Condition This timepiece is in near-mint condition, presenting a near new-like appearance with exceptional preservation. The dial is pristine with no visible damage or staining. The case retains its factory sharpness with no significant scratches or signs of heavy wear. It is a collector-grade example that appears to have been worn very sparingly over its extensive life. Dimensions The case measures 37 mm in diameter excluding the crown, which is a significant and modern-wearing size for a vintage dress watch of this era. Remarks The Business-A series occupies a unique niche in Seiko collecting, offering specifications often found in higher-tier lines like the King Seiko but in a robust package designed for daily office wear. The combination of the hidden crown case, the 27-jewel automatic movement, and the oversized 37mm profile makes this reference 8346-9000 highly desirable. Finding one in such impeccable condition is rare. History Produced in January 1967 by the Suwa Seikosha factory, this watch dates to the golden age of mechanical Seiko production, just a few years before the quartz revolution would transform the industry. The Business-A line was introduced to serve the "salaryman" demographic during Japan's economic boom, offering a blend of practicality and elegance. The "A" in the name likely denoted "Automatic" or a higher grade meant for business advancement, symbolizing the forward momentum of the era. Payment and Shipping Payment must be completed within 1-3 days after purchase. The watch will be securely packaged and shipped with tracking and insurance for your peace of mind. Please review the pictures carefully before bidding. We strive to showcase the watch from multiple angles for an accurate representation. 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-SBJ-0004