Seiko Sportmatic 820 Automatic Date – Stainless Steel – 36 mm – Vintage Japanese Mechanical Heritage – Early Automatic Era – Classic Sportmatic Design This iconic Seiko Sportmatic 820 represents one of the foundational chapters in Seiko’s rise as a global force in mechanical watchmaking. Produced during the golden age of Japanese horology, this model reflects Seiko’s early mastery of in-house automatic movements and its pursuit of reliability, precision, and everyday elegance. With its balanced 36 mm stainless steel case and clean silver dial, the Sportmatic 820 remains a timeless vintage companion. Technical Details • Brand: Seiko • Model: Sportmatic 820 • Movement: Japanese automatic, Seiko in-house • Jewels: 17 jewels (Diashock system) • Functions: Hours, minutes, seconds, date • Case Material: Stainless steel • Case Diameter: 36 mm • Case Shape: Round • Crystal: Acrylic • Dial: Silver with applied baton hour markers • Luminous: Original hands and markers • Water Resistance: 30 m (not tested) • Case Back: Stainless steel, reference visible (6202201) • Strap: Generic leather strap • Wrist Fit: Up to approx. 21 cm • Condition: Grade B+ – visible signs of use consistent with age and normal wear • Box: Generic box Story & Heritage The Seiko Sportmatic line played a pivotal role in shaping modern Japanese watchmaking. Introduced in the early 1960s, Sportmatic models were among Seiko’s first mass-produced automatic wristwatches, bridging the gap between tool watches and refined daily wear. The Sportmatic 820 stands out for its understated elegance: a sunburst silver dial, crisp applied indices, and a framed date window with magnifier that adds character and practicality. The dial proudly bears markings such as “Waterproof” and “Diashock 17 Jewels”, hallmarks of Seiko’s technological confidence during this era. Inside, the in-house automatic movement showcases Seiko’s philosophy of durability and simplicity — engineered to run reliably for decades with proper care. The stainless steel case, with its sharp lugs and polished surfaces, wears comfortably and proportionally, making it just as appealing today as it was at the time of release. A genuine piece of horological history, this Seiko Sportmatic 820 is more than a vintage watch — it is a symbol of Japan’s ascent in the world of mechanical timekeeping and a reminder that true design endures beyond trends. Express Delivery Via UPS Express Internal Reference Number - TNH 73