Vintage 1970 JAPAN KING SEIKO CALENDAR 5626-7000 25Jewels Automatic.

Vintage 1970 JAPAN KING SEIKO CALENDAR 5626-7000 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 : 042619.
• Dial number : JAPAN 5626-7000T AD.
• Glass : Crystal.
• Case size : About 37mm.
• Lug width : 18mm.
• Band : New Leather Strap of SEIKO original.

Condition :

• Used, it runs well.
• Quick set(Day/Date) : Okay.
  Day of the week can be set in English or Kanji.
  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 Standard of 1970 Corporate Luxury (1970): Manufactured in **1970**—a monumental historic year defined by the Osaka Expo '70 and Japan's peak post-war industrial confidence—the **King Seiko Calendar (56KS)** represented the definitive status symbol for high-society professionals. Born from the **Suwa Seikosha** factory under reference **5626-7000**, this early-generation 56KS flagship was engineered to challenge the highest tier of international watchmaking. It captured the crisp, uncompromising aesthetic of late-Showa corporate success.

The High-Beat 25-Jewel Caliber 5626 Automatic Heart: This masterpiece is powered by the highly respected **25-jewel Caliber 5626**, a premium in-house automatic engine operating at a swift high-beat frequency of **28,800 vibrations per hour (8 beats per second)**. Celebrated by vintage purists for its ultra-slim profile and remarkable daily stability, this movement deploys a lavish **25-jewel specification** to minimize gear-train friction. It features executive functions including **hacking seconds** and manual-winding capability.

Architectural ""7000"" Grammar of Design Case Mastery: The reference **5626-7000** is globally celebrated among vintage purists for its flawless, textbook implementation of Taro Tanaka's foundational **""Grammar of Design""** philosophy. The solid stainless steel case features incredibly sharp, angular facets and robust, beautifully tapered lugs finished with zero-distortion mirror polishing. This low center-of-gravity architecture allowed the mechanical structure to sit entirely flush against the skin, sliding effortlessly under a tailored cuff.

Immaculate Day-Date Dial Balance and Clinical Purity: The dial of the **5626-7000** is a study in mid-century visual harmony, showcasing a radiant silver sunburst canvas. It features **hand-applied, multifaceted rectangular block indices** with elegant black insert details and razor-sharp hands that catch light with high-contrast legibility. Symmetrically balanced at 3 o'clock, the dual-calendar window houses a **bilingual (English/Kanji) day disk**, prioritizing instant split-second legibility for the modern workforce.

The Sovereign Gold KS Medallion of Suwa's Heritage: The ultimate hallmark of this 1970 treasure sits proudly on the screw-down case back: a **pristine, gold-embossed King Seiko (KS) medallion**. This iconic emblem historically certified its elite manufacturing status and factory-regulated timing accuracy. Built to an uncompromising heirloom standard, the 5626-7000 stands as a profound, investment-grade testament to an era when Japan perfected the luxury automatic daily instrument.

For more information, please look at the pictures.

Notes

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