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 : 3016294.
• Dial number : 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.
• For practical, everyday use, it would be advisable to have the movement cleaned and oiled.

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.

For more information, please look at the pictures.

Notes

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