Vintage 1973 JAPAN KING SEIKO WEEKDATER 5626-7111 25Jewels Automatic.

Vintage 1973 JAPAN KING SEIKO WEEKDATER 5626-7111 25Jewels Automatic.

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

Item description

Movement :

• Pet name : 56 KING SEIKO WEEKDATER .
• Caliber number : 5626A,B.
• Movement : Automatic.
• Beat rate : 28800bph.
• Year of manufacture start : 1968's.
• Factory : Suwa.

Externals :

• Serial number : 317922.
• Dial number : JAPAN 5626-7110T.
• Glass : Crystal.
• Case size : About 36.1mm.
• Lug width : 18mm.
• Band : New Leather Strap of SEIKO original.

Condition :

• Used, it runs well.
• Quick set(Day/Date) : Okay.
  Set the day of the week can be in English or Japanese.
  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 Benchmark of 1973 Suwa King Seiko Horology (1973): Manufactured in **1973**—a milestone year during Suwa Seikosha's mechanical peak—the **King Seiko Weekdater** reference **5626-7111** represented the supreme expression of dual-calendar executive dress timepieces. Positioned at the apex of Seiko's high-grade automatic catalog, this late-series 56KS model combined daily dual-calendar utility with uncompromising factory precision and finishing.

The Legendary High-Beat 25-Jewel Caliber 5626 Engine: Powering this historic instrument is the high-grade **25-jewel Caliber 5626A**, an in-house automatic movement operating at a swift high-beat frequency of **28,800 vibrations per hour (8 beats per second)**. Renowned for its accuracy and smooth operation, this **25-jewel engine** features **hacking seconds**, manual-winding capability, and a dual-calendar quick-set mechanism.

Architectural ""7111"" Grammar of Design Case Construction: Sourced in a solid stainless steel case, the reference **5626-7111** showcases textbook adherence to Taro Tanaka's **""Grammar of Design""** philosophy. Featuring broad, sweeping lugs, razor-sharp Zaratsu-polished planes, and zero-distortion mirror surfaces, the case geometry reflects light dramatically while maintaining a low-profile, commanding presence on the wrist.

Masterful Dual-Calendar Dial Harmony and Clinical Clarity: The dial of the **5626-7111** is a study in clinical mid-century visual balance, displaying a radiant silver sunburst canvas decorated with **hand-applied, multifaceted rectangular block indices** with black central accents. Symmetrically framed at 3 o'clock, the dual-calendar aperture houses a **bilingual (English/Kanji) day disk** alongside the date wheel, perfectly offset by the applied **""KS"" emblem** and **""HI-BEAT""** typography above 6 o'clock.

The Sovereign Solid Gold KS Shield Case Back Medallion: The ultimate hallmark of prestige rests on the case back: the iconic **solid gold-embossed King Seiko ""KS"" shield medallion** set flush into the backplate center. Certifying its factory-regulated precision standard and historical status within Suwa Seikosha's legacy, the 1973 5626-7111 King Seiko Weekdater stands as an essential, investment-grade cornerstone reference for serious watch collectors worldwide.

For more information, please look at the pictures.

Notes

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