Vintage 1978 JAPAN SEIKO KING QUARTZ 5856-7030 8Jewels Quartz.

Vintage 1978 JAPAN SEIKO KING QUARTZ 5856-7030 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 : 1978's.
• Factory : Kameido.

Externals :

• Serial number : 841080.
• Dial number : JAPAN 5856-7040S.
• Glass : Crystal.
• Case size : About 34.02mm.
• Lug width : 18mm.
• Band : New Leather Strap.

Condition :

• Used, it runs well. Battery replaced
• Quick set(Day/Date) : Okay.
  Set the day of the week can be in English or Kanji.
  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 High-Precision Dawn of Late-70s King Quartz Executive Luxury (1978): Manufactured in **1978**—at the absolute height of Suwa Seikosha's quartz precision revolution—the **Seiko King Quartz** reference **5856-7030** inherited the prestige, finishing standards, and executive positioning of the legendary King Seiko line. As mechanical production scaled down in the late 1970s, the King Quartz series stood as Suwa's flagship high-accuracy offering for corporate professionals seeking unmatched micro-engineering.

The High-Grade Caliber 5856 Dual-Jeweled Quartz Heart: Powering this historic timepiece is the advanced **Caliber 5856A**, an in-houseSuwa quartz movement incorporating **8 jewels** across its gear train pivots—an extraordinarily high jewel count for a quartz movement of this era. Factory-rated to a rigorous accuracy of within **±10 seconds per month**, this movement features a quick-set dual-calendar mechanism and a second-hand hacking system designed for precise synchronization.

Architectural ""7030"" Angular Case and Late Grammar of Design Evolution: Sourced in a solid stainless steel case, the reference **5856-7030** represents the late-1970s evolution of Taro Tanaka's **""Grammar of Design""** principles. Featuring sharp angular shoulders, flat Zaratsu-polished geometric facets, and a seamlessly integrated bracelet hood, the case profile reflects ambient light with razor-sharp, zero-distortion mirror reflections while maintaining a ultra-sleek, wrist-hugging profile.

Textured Dual-Calendar Dial Harmony and Applied Double-Quartz Symbol: The dial of the **5856-7030** displays supreme late-70s artistry, set against a subtly textured matte dial canvas decorated with **hand-applied, multifaceted rectangular block indices**. Positioned at 3 o'clock is a neatly framed dual-calendar aperture housing a **bilingual (English/Kanji) day disk** and date wheel, proudly anchored by the applied metal **""KQ"" (King Quartz)** logo and Suwa's iconic twin-quartz crystal insignia above 6 o'clock.

An Investment-Grade Masterpiece of Suwa's High-Precision Heritage: Produced during the milestone golden era of Japanese quartz mastery in **1978**, the 5856-7030 King Quartz remains a highly sought-after, universally respected cornerstone reference for vintage Seiko collectors. It captures the exact historical moment where the uncompromising craftsmanship of King Seiko intersected with world-leading solid-state timekeeping technology.

For more information, please look at the pictures.

Notes

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