Seiko Business-A 8306-9000 (1967)

Presented for auction by Second Vintage This classic 1960s Seiko Business-A draws immediate attention with its beautifully preserved silver sunburst dial and distinctive mid-century case geometry. Driven by the high-jewel count Seiko 8306A automatic caliber, this timepiece offers a compelling combination of elegant design and mechanical sophistication, highlighted by its neatly recessed crown at the four o'clock position. Brand: Seiko Model: Business-A Reference Number: 8306-9000 Serial Number: 7619331 Movement: Automatic, Caliber 8306A, 30 Jewels Dial: Silver sunburst with applied faceted indices Case Size: 36 mm (excluding the crown) Case Material: Stainless Steel Production Year: 1967 Condition: Good vintage condition. Timegrapher: -60-65s/day, running in operational condition. Dial and Hands The dial is exceptionally clean and well-preserved, featuring a radiant silver sunburst finish that catches the light beautifully. Applied faceted indices and crisp black printed text provide excellent legibility and classic mid-century style. Under macro magnification, only very minor dust or spotting can be observed. The polished dauphine-style hands display an original appearance with light aging, showing minor surface oxidation and micro-scratches that complement the authentic character of the watch. Case and Crystal The stainless steel case displays honest vintage wear, presenting a polished finish with moderate surface scratches consistent with its age. Its lugs retain a generally good shape while showing signs of previous polishing. A smooth polished bezel integrates cleanly into the case design, bearing light surface scratches matching the overall wear. The unsigned crown is neatly recessed at the four o'clock position, a signature Seiko design trait of the era. A clear domed acrylic crystal protects the dial, free from any major scratches, cracks, or crazing. Movement Inside beats the Seiko caliber 8306A automatic movement, proudly engraved with its 30-jewel count. The movement presents in excellent visual condition, featuring clean plates and bridges with a well-preserved rotor. There are no obvious signs of corrosion or heavy tool marks. Timegrapher: -60-65s/day. Running in operational condition. Maintains the authentic mechanical character of the watch. Strap The watch is paired with a black leather strap featuring white contrast stitching. The strap appears lightly used or new and is secured by an unsigned steel buckle. Condition Good vintage condition. This Seiko Business-A has been well-cared for, showcasing an exceptionally clean dial and hands that display only light, honest aging under magnification. The stainless steel case and integrated bezel exhibit moderate surface scratches and signs of previous polishing typical for its age. The domed acrylic crystal remains clear and well-preserved. The movement is visually clean and running in operational condition. Dimensions Case Size: 36 mm (excluding the crown) Remarks This Seiko Business-A is a highly attractive example of mid-century Japanese watchmaking. Its combination of a radiant silver sunburst dial, the high-jewel automatic caliber, and the distinctive recessed crown makes it a refined choice for any collector of classic timepieces. History During the 1960s, Seiko rapidly expanded its lineup to cater to professionals seeking reliable, well-designed automatic timepieces. The Business-A series emerged as a refined option within this mid-century catalog, offering clean aesthetics and robust mechanical performance. Equipped with the sophisticated 30-jewel caliber 8306, these watches were designed for daily precision while maintaining an elegant profile. Today, the Business-A remains a respected model among vintage enthusiasts, representing an important era of Seiko's global expansion and mechanical innovation. / Second Vintage SKU: SEI-BXX-0003