Serviced Vintage 1966 JAPAN SEIKO SPORTSMATIC5 6619-8110 21Jewels Automatic.

Serviced Vintage 1966 JAPAN SEIKO SPORTSMATIC5 6619-8110 21Jewels Automatic.

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Item description

Movement :

• Pet name : SPORTSMATIC5 .
• Caliber number : 6619A.
• Movement : Automatic.
• Beat rate : 18000bph.
• Year of manufacture start : 1964's.
• Factory : Suwa.

Externals :

• Serial No. : 6804105.
• Dial No. : JAPAN 6619-8170T AD.
• Glass : Acrylic.
• Case size : About 36.5mm.
• Lug width : 18mm.
• Band : Wrist size that can be worn is Up to about 185mm.

Condition :

• Used, it runs well.
• Quick set(Day) : Okay.
  Set the day of the week : Kanji only.
  Set of the days of the week : Turn the hour hand for 24 hours to set it.
  Set of the date: Press the crown.
• The day difference time of an used watch is about +-1 minute / day.
• Overhaul service in November 2026.
  The movement has been cleaned and oiled, so it works fine.

Key Features

• The Sovereign Peak of Mid-60s Everyday Practical Luxury (1966): Manufactured in 1966—a pivotal milestone year during Japan's booming mid-Showa industrial era—the Seiko Sportsmatic 5 reference 6619-8110 stood as Suwa Seikosha's quintessential dual-calendar daily workhorse. As a prime early representative of the celebrated ""Seiko 5"" philosophy launched following the 1964 Tokyo Olympics, this model brought chronometric dependability, water resistance, and executive-ready sports utility to Japan's dynamic modern workforce.
• The Over-Engineered 21-Jewel Caliber 6619 Automatic Engine: Powering this historic watch is the celebrated 21-jewel Caliber 6619 (6619A), an in-house automatic engine operating at a steady frequency of 18,000 vibrations per hour (vph). Designed exclusively as a self-winding caliber, it utilizes Seiko's ultra-efficient Magic Lever bi-directional winding mechanism, proprietary Diashock shock protection, an upgraded 21-jewel specification to minimize gear-train friction, and an innovative push-crown quick-set date system activated by depressing the crown directly inward.
• Architectural ""8110"" Case and Recessed Crown Ergonomics: Executed in a solid stainless steel case, the reference 6619-8110 features classic mid-1960s case architecture with softly contoured, sweeping lugs and a polished bezel profile. Emphasizing its purely automatic design, it incorporates Suwa's signature flush-recessed crown at 4 o'clock, creating an uninterrupted, symmetrical case silhouette that sits completely flat against the wrist and prevents snagging on clothing cuffs.
• Masterful Dual-Calendar Dial Harmony and Chapter Ring Balance: The dial of the 6619-8110 is a masterclass in Showa-era layout symmetry, featuring a radiant silver sunburst canvas framed by a fine outer track. It is adorned with hand-applied, multifaceted rectangular block indices, crisp dauphine hands, a framed dual-calendar aperture displaying day and date at 3 o'clock, the applied polished ""5"" shield emblem beneath the Seiko logo, and vintage cursive ""Sportsmatic"" script with the ""DIASHOCK 21 JEWELS"" designation above 6 o'clock.
• The Sovereign Dolphin Case Back Medallion Heritage: Embellishing the backplate of this 1966 vintage treasure is Seiko's iconic embossed Dolphin crest (or deeply stamped waterproof dolphin medallion). Certifying its factory water-resistant construction and athletic sports-dress lineage, the 6619-8110 21-jewel Sportsmatic 5 remains an indispensable, highly accessible cornerstone reference for serious vintage Seiko collectors worldwide.

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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