Vintage 1965 JAPAN SEIKO SEIKOMATIC WEEKDATER 6218-8971 35Jewels Automatic.

Vintage 1965 JAPAN SEIKO SEIKOMATIC WEEKDATER 6218-8971 35Jewels Automatic.

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Item description

Movement :

• Pet name : SEIKOMATIC WEEKDATER .
• Caliber number : 6218A,B,C.
• Movement : Automatic.
• Beat rate : 18000.
• Year of manufacture start : 1964's.
• Factory : Suwa.

Externals :

• Serial No. : 5002037.
• Dial No. : JAPAN 6218-8971T AD.
• Glass : Acrylic.
• Case size : About 37mm.
• Lug width : 19mm.
• Band : Wrist size that can be worn is Up to about 190mm.

Condition :

• Used, it runs well.
• Quick set(Day/Date) : Okay.
  Set the day of the week can be in English only.
  Set of the date : The set at one stage pulling the crown.
  Set of the week : Iteration the hour hand at 9:00 to 1:00.
• The day difference time of an used watch is about +-1 minute / day.
• For practical, everyday use, it would be advisable to have the movement cleaned and oiled.

Key Features

• The Sovereign Apex of Mid-60s Business Executive Luxury (1965): Manufactured in 1965—a momentous historical year following the Tokyo Olympics and marking the height of Japan's mid-Showa economic ascent—the Seiko Seikomatic Weekdater reference 6218-8971 stood as Suwa Seikosha's absolute top-of-the-line executive flagship. Positioned directly alongside early Grand Seiko standards and sharing its architectural foundation with the legendary 62GS, this reference embodied the pinnacle of self-winding luxury.
• The Over-Engineered 35-Jewel Caliber 6218 Automatic Heart: Powering this historic watch is the celebrated 35-jewel Caliber 6218 (6218B/C), an in-house automatic engine operating at a frequency of 18,000 vibrations per hour (vph). Fitting an extravagant 35-jewel specification into an automatic movement drastically reduced friction across the gear train, featuring a fine micro-regulator screw, Seiko's Diashock anti-shock protection, an efficient Magic Lever bi-directional winding system, quick-set date calendar control, and hacking seconds.
• Architectural ""8971"" Grammar of Design Case and Recessed Crown: Executed in a solid stainless steel case, the reference 6218-8971 features bold, sweeping faceted lugs with razor-sharp polished chamfers inspired by Taro Tanaka's early ""Grammar of Design"" principles. Incorporating Suwa's signature flush-recessed crown at 4 o'clock, the case maintains a completely seamless, symmetrical circular silhouette that sits flat against the wrist and slides effortlessly under a formal shirt cuff.
• Masterful Dual-Calendar Dial Harmony and Arched Day Window: The dial of the 6218-8971 is universally acclaimed for its flawless mid-century layout balance, featuring a radiant silver sunburst canvas framed by a finely grooved chapter ring. It is adorned with hand-applied, multifaceted rectangular block indices, crisp dauphine hands, a framed quick-set date aperture at 3 o'clock, and the iconic full day-of-the-week window positioned at 6 o'clock, proudly signed with cursive ""Seikomatic"" script and the ""DIASHOCK 35 JEWELS"" designation.
• The Sovereign Gold Lion or Dolphin Case Back Medallion Heritage: Embellishing the backplate of this 1965 treasure is the iconic embossed case back medallion (often featuring the prestigious Seiko Lion or Dolphin crest). Certifying its factory-tested water resistance and high-grade executive pedigree, the 6218-8971 35-jewel Seikomatic Weekdater remains an indispensable, investment-grade cornerstone reference for serious vintage Seiko collectors worldwide.

For more information, please look at the pictures.

Notes

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