Vintage 1978 JAPAN SEIKO KING QUARTZ 5856-8080 8Jewels Quartz.

Vintage 1978 JAPAN SEIKO KING QUARTZ 5856-8080 8Jewels Quartz.

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

Item description

Movement :

• Pet name : 58　KING QUARTZ.
• Caliber number : 5856A.
• Movement : Quartz.
• Year of manufacture start : 1977's.
• Factory : Kameido.

Externals :

• Serial number : 871169.
• Dial number : JAPAN 5856-8100S.
• Glass : Crystal.
• Case size : About 36mm.
• Lug width : 19mm.
• Band : Can be adjust the length.

Condition :

• Used, it runs well. Battery replaced
• 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.
• Approximate watch rate at Japan : Quartz.
• For practical, everyday use, it would be advisable to have the movement cleaned and oiled.

Key Features

The Apex of 1978 High-End Quartz Leadership (1978): Manufactured in **1978**—a historic milestone year during the peak of Japan's quartz revolution and electronic precision mastery—the **Seiko King Quartz** represented Daini Seikosha's executive-tier answer to traditional mechanical luxury. Sourced under reference **5856-8080**, this late-1970s flagship inherited the prestige of the legendary King Seiko line, combining razor-sharp Showa-era styling with unmatched electronic accuracy.

The Over-Engineered 8-Jewel Caliber 5856 Quartz Engine: Powering this historic timepiece is the highly revered **8-jewel Caliber 5856**, an in-house high-grade quartz movement built with a lavish **8-jewel specification** to control gear-train pivot wear—an exceptional level of mechanical quality for early quartz calibers. Offering superb monthly timekeeping stability, it features **hacking seconds**, quick-set dual calendar functionality, and a dedicated trimmer capacitor for precise rate regulation.

Architectural ""8080"" Octagonal Bezel and Integrated Case Geometry: The reference **5856-8080** is globally distinguished among vintage Seiko collectors for its striking, geometric **octagonal bezel design**. Executed in solid stainless steel, the case features flat, razor-sharp facets and sweeping integrated lugs finished with zero-distortion mirror polishing inspired by Taro Tanaka's **""Grammar of Design""** principles, allowing the watch to sit remarkably flat and balanced on the wrist.

Masterful Dial Texture and Applied Quartz Crest Harmony: The dial of the **5856-8080** displays exceptional visual depth, featuring a fine textured canvas paired with **hand-applied, multifaceted rectangular hour indices** and sharp hands. Symmetrically framed at 3 o'clock, the dual-calendar window houses a **bilingual (English/Kanji) day disk** alongside the date wheel, proudly signed with the applied **""KING QUARTZ""** typography and the iconic double-comb quartz crest above 6 o'clock.

An Investment-Grade Treasure of Daini's Electronic Heritage: Manufactured in the milestone year of **1978**, the 5856-8080 King Quartz remains an extraordinarily popular, highly sought-after cornerstone reference for vintage Seiko enthusiasts worldwide. It captures the exact historical era where Japanese quartz engineering achieved luxury status alongside mechanical horology. Built to an uncompromising heirloom standard, it stands as an eternal testament to late-1970s Japanese watchmaking innovation.

For more information, please look at the pictures.

Notes

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