Serviced Vintage 1973 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7071 23Jewels Automatic.

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

Item description

It's a SEIKO Automatic Watch, LORD MATIC WEEKDATER 5606-7071 23Jewels .
It's in good used condition.
It's difficult to find this valuable watch in such a good condition. Highly recommended for SEIKO collectors!
Movement :
  • Pet name : 56 LORD MATIC WEEKDATER .
  • Caliber number : 5606A.
  • Movement : Automatic.
  • Beat rate : 21600bph.
  • Year of manufacture start : 1968's.
  • Factory : Suwa.
Externals :
  • Serial number : 355051.
  • Dial number : JAPAN 5606-7071R.
  • Glass : Crystal.
  • Case size : About 36.8mm.
  • Lug width : 18mm.
  • Band : Wrist size that can be worn is Up to about 206mm.
Condition :
  • Used, it runs well.
  • 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.
  • The day difference time of an used watch is about +-1 minute / day.
  • Overhaul service in July 2026.
    The movement has been cleaned and oiled, so it works fine.
Key Features
  • The Zenith of 1970s Executive Utility (1973): In **1973**, the **Seiko Lord Matic (LM)** stood as the definitive daily luxury watch for Japan's high-ranking business class and ambitious corporate leaders. The reference **5606-7071** was produced by the **Suwa Seikosha** factory during a landmark year when mechanical watchmaking reached its pinnacle of structural refinement to compete with the early quartz era. It was designed to offer a clinical, highly dependable instrument that exuded executive confidence, defining the disciplined and sharp-looking style of the mid-Showa economic boom.
  • The Proven 23-Jewel Caliber 5606 Heart: This watch is powered by the **23-jewel Caliber 5606**, an ultra-slim high-grade automatic movement operating at **21,600 vibrations per hour (vph)**. In **1973**, the 56-series was world-renowned for its innovative slim profile, allowing the watch to maintain a sleek silhouette while offering premium features like **hacking seconds**, manual winding capability, and an integrated day-date quick-set. This caliber remains a masterpiece of Japanese engineering, designed for clinical precision and long-term daily reliability.
  • Architectural ""7071"" Grammar of Design Case: The reference **5606-7071** is a brilliant and faithful execution of the legendary **Seiko ""Grammar of Design""** philosophy. The stainless steel case features sharp, angular lugs and mirror-polished flat surfaces that create a crisp play of light and shadow. As a refined intermediate iteration within the classic 7070 lineage, the 7071 profile optimized wrist presence with a remarkably low center of gravity, ensuring the watch sat perfectly flush and comfortably under a tailored dress shirt cuff.
  • Masterful ""Weekdater"" Dial Harmony: The dial of the **5606-7071** is a study in functional luxury, featuring a radiant sunburst silver finish and **hand-applied, multi-faceted baton indices**. The dual-calendar window at 3 o'clock houses a **bilingual (English/Kanji) day disk**, prioritizing instant legibility for the internationalizing Japanese workforce. The applied **""LM"" logo** and the Suwa lightning bolt symbol at 6 o'clock remain prestigious hallmarks of an era that valued uncompromising industrial pride and meticulous attention to detail.
  • A Landmark of Suwa's Slim Mechanical Legacy: Produced in **1973**, the 5606-7071 remains a highly respected reference for collectors who value the **""Mechanical Golden Age.""** It represents the perfect intersection of **mechanical complexity and the minimalist modernist movement** of the 1970s. It stands as a testament to an era when Suwa Seikosha perfected the **""high-utility professional automatic,""** creating a reliable and visually striking masterpiece that remains as stylish and accurate today as it was over half a century ago.
    • For more information, please look at the pictures.
    Notes
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