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 number : 400.
• Movement : Automatic.
• Beat rate : 18000bph.
• Year of manufacture start : 1963's.
• Factory : Suwa.

Externals :

• Serial number : 3012290.
• Dial number : MADE IN JAPAN 40898 TO.
• Glass : Acrylic.
• Case size : About 37.1mm.
• Lug width : 19mm.
• Band : New Leather Strap of SEIKO original.

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.
• For practical, everyday use, it would be advisable to have the movement cleaned and oiled.

Key Features

The Inaugural Founding Pioneer of the Weekdater Legacy (1963): Manufactured in **1963**—a historic landmark year preceding the Tokyo Olympics—the **Seiko Matic Weekdater** reference **J13080** stands as the ultimate ""first generation"" pioneer that birthed Seiko's iconic full-calendar dress watch lineage. Sourced in the pre-1964 numbering era, this Suwa Seikosha flagship introduced the world's very first automatic movement featuring a full day-of-the-week spelled out in an arched aperture.

The Ultra-High Jewel 33-Jewel Caliber 400 Automatic Engine: Powering this historic treasure is the legendary **33-jewel Caliber 400** (later designated as the 6218 caliber family), operating at a steady frequency of **18,000 vibrations per hour (vph)**. Equipping an automatic watch in **1963** with a monumental **33-jewel count** represented the pinnacle of mechanical luxury engineering, scattering synthetic rubies across gear-train pivots and winding components to virtually eliminate wear.

Architectural ""J13080"" Heavy Case Geometry and Recessed Crown: Sourced in a robust, heavy-gauge stainless steel case, the reference **J13080** features bold, sweeping lugs with thick polished chamfers. Designed with an ultra-slim bezel profile and the signature **recessed crown hidden at 4 o'clock**, the case achieves a smooth, crownless silhouette that sits remarkably flush and commanding on the wrist.

Historic Arched ""Weekdater"" Dial Layout and Mid-Century Elegance: The dial of the **J13080** is a masterclass in early-1960s horological design, displaying a radiant silver sunburst canvas decorated with **hand-applied, multifaceted rectangular indices**. It proudly showcases the iconic **curved full-day window positioned above 6 o'clock**—spelling out days like ""WEDNESDAY"" in crisp typography—perfectly balanced by the independent date window framed at 3 o'clock and the script **""Seikomatic""** logo.

The Sovereign Solid Gold Dolphin Case Back Medallion: The ultimate seal of prestige sits embedded on the case back: the iconic **solid gold-embossed Seiko Dolphin medallion** (or deeply etched early crown/dolphin crest). Certifying its elite factory-regulated chronometric standards and water-resistant construction, the 1963 J13080 33-jewel Seikomatic Weekdater stands as an indispensable, holy-grail cornerstone reference for vintage watch collectors worldwide.

For more information, please look at the pictures.

Notes

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