Serviced Vintage 1963 JAPAN SEIKO MATIC WEEKDATER J13080 33Jewels Automatic.

Vintage 1963 JAPAN SEIKO MATIC WEEKDATER J13080 33Jewels Automatic.

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

Item description

Movement :

• Pet name : MATIC WEEKDATER .
• Caliber No. : 400.
• Movement : Automatic.
• Beat rate : 18000bph.
• Year of manufacture start : 1963's.
• Factory : Suwa.

Externals :

• Serial No. : 3912572.
• Dial No. : JAPAN MAWJ13H333AD.
• Glass : Acrylic.
• Case size : About 37mm.
• Lug width : 19mm.
• Band : New Leather Strap.

Condition :

• Used, it runs well.
• Quick set(Day/Date) : Okay.
  Set the day of the week : 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.
• Overhaul service in October 2026.
  The movement has been cleaned and oiled, so it works fine.

Key Features

• The Holy-Grail Founding Dawn of Full-Day "Weekdater" Horology (1963): Manufactured in 1963—a landmark year in Japanese horological history—the Seiko Matic Weekdater reference J13080 stands as the historic "first-generation" pioneer that launched Seiko's iconic full-day calendar line. As Suwa Seikosha's original high-grade automatic Weekdater prior to the introduction of four-digit case numbering, this Holy Grail reference defined executive wrist presence for the 1960s Japanese corporate boom.
• The Extraordinary Ultra-High 33-Jewel Caliber 400 Movement: Powering this historic masterpiece is the revered 33-jewel Caliber 400 (later designated as the 6218 family), operating at a classic frequency of 18,000 vibrations per hour (vph). Outfitted with an incredible 33-jewel specification to drastically eliminate gear-train friction, this movement represents Suwa Seikosha's over-engineered commitment to chronometric precision, featuring hacking seconds and Seiko's proprietary Diashock protection.
• Architectural "J13080" Heavy-Gauge Case and Recessed Crown Integration: Sourced in a heavy-gauge solid stainless steel case, the reference J13080 exhibits early, bold "Grammar of Design" roots with its thick, angular lugs and broad zero-distortion mirror-polished bevels. Designed with Suwa's signature recessed crown hidden at 4 o'clock, the case maintains an uninterrupted, ultra-clean silhouette that rests commanding and flush on the wrist.
• Historic Arched Full-Day Dial Layout and 33-Jewel Branding: The dial of the J13080 displays pure mid-century executive elegance, set against a radiant silver sunburst canvas set with hand-applied, multifaceted rectangular block indices. It proudly features the iconic curved full-day aperture positioned above 6 o'clock—spelling out days like "MONDAY" in full typography—complemented by a framed date window at 3 o'clock, the applied "Seiko Matic" script, and the prominent "33 JEWELS" designation.
• The Sovereign Solid Gold Dolphin Case Back Medallion: The ultimate hallmark of origin rests on the case back: the iconic solid gold-embossed Seiko Dolphin medallion set into the case center. Certifying its elite factory-regulated chronometric standards and historically signifying the absolute birth of the Weekdater legacy, the 1963 J13080 33-jewel Seiko Matic Weekdater is an essential, holy-grail investment-grade reference for world-class Seiko collectors.

For more information, please look at the pictures.

Notes

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