Vintage 1967 JAPAN SEIKO SEIKOMATIC-R 8305-8060 30Jewels Automatic.

Vintage 1967 JAPAN SEIKO SEIKOMATIC-R 8305-8060 30Jewels Automatic.

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

Item description

Movement :

• Pet name : 83 SEIKOMATIC-R.
• Caliber number : 8305C.
• Movement : Automatic.
• Beat rate : 18000bph.
• Year of manufacture start : 1965's.
• Factory : Suwa.

Externals :

• Serial No. : 7614645.
• Dial No. : JAPAN 8305-8070S AD.
• Glass : Acrylic.
• Case size : About 34.35mm.
• Lug width : 18mm.
• Band : New Leather Strap of SEIKO original.

Condition :

• Used, it runs well.
• ONE PIECE CASE
  Quick set(Day/Date) : Okay.
  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 Peak of Mid-60s Business Executive Luxury (1967): Manufactured in 1967—a milestone year during Japan's mid-Showa economic expansion—the Seiko Seikomatic-R reference 8305-8060 represented Suwa Seikosha's elevated date-only flagship within the refined ""R"" (Revised/Refined) series. Engineered to offer corporate executives superior thinness and mechanical sophistication, it bridged the gap between daily sports automatics and top-tier dress timepieces.
• The Over-Engineered 30-Jewel Caliber 8305 Automatic Heart: Powering this historic timepiece is the lavish 30-jewel Caliber 8305B, an in-house automatic engine operating at a frequency of 18,000 vibrations per hour (vph). Equipping an automatic movement in 1967 with an extravagant 30-jewel specification drastically reduced gear-train friction across critical pivots, featuring an efficient bi-directional automatic winding system, quick-set date calendar control, and manual-winding capability.
• Architectural ""8060"" Grammar of Design Case Geometry: Executed in a solid stainless steel case, the reference 8060 features crisp, angular faceted lugs and broad polished bevels inspired by Taro Tanaka's early ""Grammar of Design"" guidelines. The low-profile case design allows the watch to rest completely flush against the wrist, sliding effortlessly under a tailored shirt cuff.
• Masterful ""Seikomatic-R"" Dial Harmony and Typography: The dial of the 8305-8060 showcases exemplary mid-1960s visual balance, featuring a radiant silver sunburst canvas decorated with hand-applied, multifaceted rectangular block indices and sharp dauphine hands. Symmetrically framed at 3 o'clock, the quick-set date aperture is offset by the applied metal ""Seikomatic-R"" script and the ""30 JEWELS"" designation above 6 o'clock.
• An Investment-Grade Masterpiece of Suwa's Automatic Heritage: Manufactured in the landmark mechanical year of 1967, the 8305-8060 30-jewel Seikomatic-R remains a highly sought-after, universally respected cornerstone reference for serious vintage Seiko collectors worldwide. Capturing the precise era where Suwa Seikosha perfected high-jewel, ultra-refined executive automatic dress watches, it stands as an eternal heirloom of Japanese horological history.

For more information, please look at the pictures.

Notes

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