Offered in this auction by Second Vintage This Seiko Business-A 8306-8020 is a refined and rarely encountered example from Seiko’s golden period, embodying the understated sophistication that distinguished the brand in the 1960s. Powered by a robust 30-jewel automatic movement and dating precisely to 1967 by its serial number, this watch offers collectors a harmonious blend of mid-century style and enduring mechanical quality. The sharp, faceted lines of the stainless steel case and the crisp silver dial with applied indices capture the essence of period-correct elegance. With a distinctive day-date display and well-preserved finishes, this Business-A stands out as a classic piece suitable for collection or everyday wear. Brand: Seiko Model: Business-A Reference Number: 8306-8020 Serial Number: 7505938 Movement: Seiko automatic, 30 jewels Dial: Silver with applied indices and day-date window at 3 o’clock Case Size: 35mm (excluding the crown) Case Material: Stainless steel Production Year: 1967 Condition: Very good vintage condition overall; running at +53/+60s per day on timegrapher, indicating the movement is operational and robust for its age. Dial and Hands The silver sunburst dial presents beautifully, showing minimal signs of aging and a clean, even tone. All applied hour markers are sharp and intact, while the immaculate Seiko and Business-A logos reinforce a sense of originality. The dauphine hands remain in excellent condition with their original profile and sheen, and the day-date complication at 3 o’clock is crisp and highly legible. Case and Crystal The stainless steel case retains bold factory lines and strong facets, with only light, superficial marks consistent with careful wear. The lugs display their original sharpness. The acrylic crystal is clear, showing minor, unobtrusive marks that do not detract from dial visibility or aesthetics. Movement This watch houses Seiko’s renowned 30-jewel automatic movement, celebrated for its durability and smooth day-date mechanism. A recent timegrapher reading indicates a performance of +53/+60s per day, attesting to a healthy and active movement. Strap Fitted with a handsome black leather strap that pairs elegantly with the stainless steel case. The strap is in excellent condition, lightly worn with no cracks or major creasing. Condition Overall, this Seiko Business-A 8306-8020 is in very good vintage condition, highlighted by a clean dial, strong case lines, and a robust, well-running movement. Dimensions Case diameter: 35mm (excluding the crown) Remarks A seldom-seen offering, the Seiko Business-A 8306-8020 is an outstanding representative of Seiko’s advanced mid-century watchmaking. Its rare designation, well-preserved dial, and sharp case make it a standout choice for collectors and enthusiasts of classic Japanese horology. History The Seiko Business-A series debuted in the 1960s, catering to professionals seeking refined automatic watches with superior finishing. The 8306-8020 embodies this ethos, boasting a high-grade automatic movement and an elegant case design. Today, the Business-A is celebrated for its durability, aesthetic purity, and lasting value in the pantheon of vintage Seiko timepieces. 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-0001