Vintage 1975 JAPAN KING SEIKO SPECIAL 5256-8000 25Jewels Automatic.

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

Item description

Movement :

• Pet name : KING SEIKO SPECIAL .
• Caliber number : 5256A.
• Movement : Automatic.
• Beat rate : 28800bph.
• Year of manufacture start : 1973's.
• Factory : Kameido.

Externals :

• Serial number : 530940.
• Dial number : JAPAN 5256-8000S.
• Glass : Crystal.
• Case size : About 36.5mm.
• Lug width : 19mm.
• 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 ""Final"" Mechanical King Seiko (1975): Manufactured in **1975**, the reference **5256-8000** stands as the ultimate and final model of the original mechanical King Seiko era. As the quartz revolution reached its peak, the **Daini Seikosha (Kameido)** factory poured all its horological expertise into this ""Special"" edition, making it a swan song of mechanical excellence and a defiant tribute to the craft of traditional watchmaking.

The Elite Caliber 5256: This watch is powered by the **25-jewel Caliber 5256**, widely considered the pinnacle of the 52-series automatic movements. Operating at a **Hi-Beat 28,800 vibrations per hour (8 beats per second)**, it was a ""Special"" grade movement, meaning it was regulated to higher precision standards than standard LMs. This caliber is so robust and well-designed that it later became the blueprint for the **modern Seiko 4S movement** revival in the 1990s.

The Peak of ""Grammar of Design"" (8000 Case): The reference **5256-8000** features a stunningly sharp and architectural case. Following the strict laws of ""Seiko Style,"" it is defined by flat surfaces and mirror-polished angles that reflect light with surgical precision. By **1975**, this design had evolved to be bold and masculine, providing a powerful presence on the wrist that felt both futuristic and timeless.

Distinctive ""Special"" Dial and Calendar: The dial of this **1975** masterpiece often features a unique ""linen"" or ""sand"" texture, adorned with the **applied gold or steel ""KS"" logo** and the word ""Special."" It features an instantaneous date-change mechanism and a **bilingual (English/Kanji) day disk**. The high-contrast, multi-faceted indices were designed to ensure that the time could be read instantly, even in low-light boardroom conditions.

A Connoisseur's Grail: Because it was produced during the final year of the King Seiko line (**1975**), the 5256-8000 is a rare and highly coveted piece for collectors. It represents the end of an era—the final moment before Seiko pivoted entirely to quartz. To own this watch is to own the **mechanical culmination of the Daini Seikosha factory's history**, a watch that refused to compromise on quality even at the end of its production run.

For more information, please look at the pictures.

Notes

• Before buying.
  The vintage watches we sell are inspected and adjusted so they work fine. However, since it is an vintage watch, Please purchase on the assumption that it will be repaired.
  
  
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