• Vintage 1966 JAPAN SEIKO 83 SEIKOMATIC-R 8346-8000 27Jewels Automatic.
  • Vintage 1966 JAPAN SEIKO 83 SEIKOMATIC-R 8346-8000 27Jewels Automatic.
  • Vintage 1966 JAPAN SEIKO 83 SEIKOMATIC-R 8346-8000 27Jewels Automatic.
  • Vintage 1966 JAPAN SEIKO 83 SEIKOMATIC-R 8346-8000 27Jewels Automatic.
  • Vintage 1966 JAPAN SEIKO 83 SEIKOMATIC-R 8346-8000 27Jewels Automatic.
  • Vintage 1966 JAPAN SEIKO 83 SEIKOMATIC-R 8346-8000 27Jewels Automatic.
  • Vintage 1966 JAPAN SEIKO 83 SEIKOMATIC-R 8346-8000 27Jewels Automatic.
  • Vintage 1966 JAPAN SEIKO 83 SEIKOMATIC-R 8346-8000 27Jewels Automatic.
  • Vintage 1966 JAPAN SEIKO 83 SEIKOMATIC-R 8346-8000 27Jewels Automatic.
  • Vintage 1966 JAPAN SEIKO 83 SEIKOMATIC-R 8346-8000 27Jewels Automatic.
  • Vintage 1966 JAPAN SEIKO 83 SEIKOMATIC-R 8346-8000 27Jewels Automatic.
  • Vintage 1966 JAPAN SEIKO 83 SEIKOMATIC-R 8346-8000 27Jewels Automatic.
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Seiko

Vintage 1966 JAPAN SEIKO 83 SEIKOMATIC-R 8346-8000 27Jewels Automatic.

Vintage 1966 JAPAN SEIKO 83 SEIKOMATIC-R 8346-8000 27Jewels Automatic.

¥74,900 JPY
¥74,900 JPY
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Vintage 1966 JAPAN SEIKO 83 SEIKOMATIC-R 8346-8000 27Jewels Automatic.

Welcome to my auction!
I am Japanese who live in Tokyo.

Item description

It's a SEIKO Automatic Watch, 83 SEIKOMATIC-R 8346-8000 27Jewels .
It's in good used condition.
It's difficult to find this valuable watch in such a good condition. Highly recommended for SEIKO collectors!
Movement :
  • Pet name : 83 SEIKOMATIC-R.
  • Caliber number : 8346A.
  • Movement : Automatic.
  • Beat rate : 18000bph.
  • Year of manufacture start : 1966's.
  • Factory : Suwa.
Externals :
  • Serial number : 6915370.
  • Dial number : JAPAN 8346-8010T AD.
  • Glass : Acrylic.
  • Case size : About 36mm.
  • Lug width : 18mm.
  • Band : Wrist size that can be worn is Up to about 185mm.
Condition :
  • Used, it runs well.
  • Quick set(Day/Date) : Okay.
    Set the day of the week : English only.
    Set of the days of the week : Iteration the hour hand at 9:00 and 1:00.
    Set of the date : The set at one stage pulling the crown.
  • 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 Dawn of the Business-A Executive Series (1966): Manufactured in **1966**—a defining milestone year during Suwa Seikosha's mid-century expansion—the **Seiko Business-A (Business Automatic)** reference **8346-8000** represents the inaugural wave of Seiko's dedicated corporate executive watches. Created to provide post-war Japan's rising white-collar workforce with high-grade dual-calendar utility, this 27-jewel reference served as the crucial evolutionary bridge between the earlier Seikomatic series and the upper-tier Lord Matic lineup.
  • The Over-Engineered 27-Jewel Caliber 8346 Automatic Heart: Powering this historic timepiece is the refined **27-jewel Caliber 8346A**, an in-house automatic engine operating at a steady frequency of **18,000 vibrations per hour (vph)**. Equipping an executive dress watch in **1966** with an over-engineered **27-jewel specification** minimized gear-train pivot friction to ensure long-term rate stability, while offering modern operational conveniences including **hacking seconds**, quick-set date control, and manual-winding capability.
  • Architectural ""8000"" Grammar of Design Case and Recessed Crown: Sourced in a solid stainless steel case, the reference **8346-8000** exhibits classic early **""Grammar of Design""** principles, featuring sharp, sweeping lug chamfers and broad zero-distortion Zaratsu-polished side bevels. Designed with a slim bezel and Suwa's signature **recessed crown positioned flush at 4 o'clock**, the case maintains an uncluttered, crownless outer profile that glides effortlessly under a formal shirt cuff.
  • Masterful Dual-Calendar Dial Layout and Executive Typography: The dial of the **8346-8000** showcases clinical mid-1960s visual balance, displaying a radiant silver sunburst canvas decorated with **hand-applied, multifaceted rectangular hour indices**. Framed neatly at 3 o'clock is a dual-calendar aperture housing both the day and date wheels, anchored symmetrically by the applied stylized **""Business-A""** logo and **""27 JEWELS""** designation above 6 o'clock.
  • An Investment-Grade Pillar of Suwa's Executive Heritage: Manufactured in the milestone mechanical year of **1966**, the 8346-8000 27-jewel Business-A remains a highly sought-after, universally respected cornerstone reference for vintage Seiko purists. It stands as an essential historical artifact capturing the exact era where Seiko pioneered specialized executive timepieces tailored for Japan's emerging corporate leaders.
    • For more information, please look at the pictures.
    Notes
    • Before buying.
      The vintage watches we sell are inspected and adjusted so they work fine. However, since it is an vintage watch, Please purchase on the assumption that it will be repaired.

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