Vintage 1966 JAPAN SEIKO 83 SEIKOMATIC-R 8346-9000 27Jewels Automatic.

Vintage 1966 JAPAN SEIKO 83 SEIKOMATIC-R 8346-9000 27Jewels Automatic.

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

Item description

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 : 6D31667.
• Dial number : JAPAN 8346-9000S AD.
• Glass : Crystal.
• Case size : About 37.3mm.
• Lug width : 19mm.
• Band : New Leather Strap.

Condition :

• Used, it runs well.
• Quick set(Day/Date) : Okay.
  Set the day of the week : Engrish only.
  Set of the days of the week : Iteration the hour hand at 9:00 and 12:00.
  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 Milestone of Mid-60s Executive Dress Luxury (1966): Manufactured in **1966**—a landmark historical year defined by Japan's post-war economic growth and technical watchmaking leadership—the **Seiko Seikomatic-R 8346-9000** represented the flagship tier of Suwa Seikosha's executive automatic collection. Positioned as an elite ""Refined"" (R-series) dress instrument, it was created to offer high-society professionals an ideal blend of ultra-slim case architecture and dependable daily automatic performance.

The Over-Engineered 27-Jewel Caliber 8346 Automatic Heart: Powering this historic timepiece is the revered **27-jewel Caliber 8346A**, an in-house slim automatic movement operating at a classic frequency of **18,000 vibrations per hour (vph)**. Equipping an executive dress watch in **1966** with a lavish **27-jewel specification** was a monumental statement of micro-engineering prowess. Utilizing a dense array of synthetic rubies across gear-train pivots to minimize rotor friction, it features **hacking seconds** and smooth manual-winding capability.

Architectural ""9000"" Low-Profile Case and Classic Geometry: The reference **8346-9000** is globally celebrated among vintage purists for its textbook mid-century dress proportions. The solid case features an extraordinarily thin bezel paired with **slender, multifaceted lugs** finished with zero-distortion mirror polishing. Designed with a low-profile crown and low center of gravity, it sits entirely flush against the skin, sliding weightlessly under a tailored formal cuff.

Immaculate Dual-Calendar Dial Harmony and Visual Clarity: The dial of the **8346-9000** is a study in mid-century visual balance, showcasing a radiant silver sunburst canvas. It features **hand-applied, multifaceted rectangular block indices** with fine insert details and razor-sharp hands that catch light with high contrast. Symmetrically framed at 3 o'clock, the dual-calendar window displays both day and date, proudly completed by the applied **""Seikomatic-R""** typography above 6 o'clock.

An Investment-Grade Masterpiece of Suwa's Automatic Heritage: Manufactured in the milestone mechanical year of **1966**, the 8346-9000 27-jewel Seikomatic-R remains a highly coveted, universally respected cornerstone reference for serious vintage Seiko collectors worldwide. It captures the exact historical moment where Suwa Seikosha perfected high-grade slim automatic movements right before the industry transitioned to high-frequency platforms. Built to an uncompromising heirloom standard, it stands as an eternal testament to mid-1960s Japanese watch design.

For more information, please look at the pictures.

Notes

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