Vintage 1971 JAPAN KING SEIKO CHRONOMETER SPECIAL 5245-6000 25Jewels Automatic.

Vintage 1971 JAPAN KING SEIKO CHRONOMETER SPECIAL 5245-6000 25Jewels Automatic.

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

Item description

Movement :

• Pet name : 52 KING SEIKO CHRONOMETER SPECIAL (CALENDAR) .
• Caliber number : 5245A.
• Movement : Automatic.
• Beat rate : 28800bph.
• Year of manufacture start : 1971's.
• Factory : Kameido.

Externals :

• Serial number : 190515.
• Dial number : JAPAN 5245-6000R.
• Glass : Crystal.
• Case size : About 36mm.
• Lug width : 18mm.
• Band : New Leather Strap of SEIKO original.

Condition :

• Used, it runs well.
• Quick set(Day/Date) : Okay.
  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 High-Beat Sovereign of 1972 Executive Luxury (1972): Manufactured in **1972**—a milestone historical year during Japan's peak post-war industrial confidence and global horological expansion—the **King Seiko Weekdater (56KS)** represented the gold standard of high-society daily prestige. Born from the prestigious **Suwa Seikosha** factory under reference **5626-7120**, this executive timepiece was engineered specifically to challenge the finest international chronometer houses, serving as a proud status symbol during the heights of the Showa economic miracle.

The High-Beat 25-Jewel Caliber 5626 Automatic Heart: This masterpiece is powered by the legendary **25-jewel Caliber 5626**, an in-house automatic engine operating at a swift high-beat frequency of **28,800 vibrations per hour (8 beats per second)**. Highly celebrated by vintage purists for its remarkably slim architecture and superior daily stability, this movement deploys a lavish **25-jewel specification** to control gear-train friction. It integrates modern executive conveniences including **hacking seconds**, quick-set dual calendar functionality, and smooth manual-winding capability.

Architectural ""7120"" Grammar of Design Case Geometry: The reference **5626-7120** is globally distinguished among vintage collectors for its textbook execution of Taro Tanaka's foundational **""Grammar of Design""** philosophy. The solid stainless steel case features extraordinarily sharp, muscular facets and robust, broad-shouldered lugs finished with zero-distortion mirror polishing. This low center-of-gravity design allows the mechanical instrument to sit completely flush against the wrist, sliding weightlessly under a tailored shirt cuff.

Immaculate Weekdater Dial Harmony and Bilingual Utility: The dial of the **5626-7120** is a masterclass in mid-century visual restraint, 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 framed at 3 o'clock, the dual-calendar window houses a **bilingual (English/Kanji) day disk** alongside a quick-set date configuration for high-efficiency daily legibility.

The Sovereign Gold KS Medallion or Engraved Case Back Heritage: The ultimate hallmark of this 1972 treasure sits proudly on the case back: the iconic **King Seiko (KS) medallion or deeply engraved KS crest**. This emblem historically certified its elite manufacturing status and factory-regulated timing accuracy. Built to an uncompromising heirloom standard that easily transcends passing fashion trends, the 5626-7120 stands as a profound, investment-grade testament to the golden age of Japanese mechanical design.

For more information, please look at the pictures.

Notes

• Before buying.
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