Serviced Vintage 1970 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7000 25J Automatic.

Serviced Vintage 1970 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7000 25Jewels Automatic.

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

Item description

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 : 035940.
• Dial number : JAPAN 5606-7091S.
• Glass : Acrylic.
• Case size : About 35.76mm.
• Lug width : 19mm.
• Band : New leather strap.

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 April 2026.
  The movement has been cleaned and oiled, so it works fine.

Key Features

The Standard of Professional Success (1970): In **1970**, the **Seiko Lord Matic (LM)** was the definitive timepiece for Japan's rising managerial class. The reference **5606-7000** was produced by the **Suwa Seikosha** factory during a landmark year for Japanese culture and industry. It arrived as a sophisticated, high-performance automatic that offered the elite professional ""Grand Seiko-like"" aesthetics—sharp angles and mirror finishes—positioning it as the ""luxury standard"" for the globalizing business world of the early 1970s.

The Upgraded 25-Jewel Caliber 5606 Heart: This watch is powered by the **25-jewel Caliber 5606**, a premium high-spec version of the 56-series movement operating at **21,600 vibrations per hour (vph)**. In **1970**, the **25-jewel specification** was a mark of superior mechanical luxury, providing extra synthetic rubies to minimize friction in the gear train and calendar works. This movement was a breakthrough in slim-profile architecture, featuring **hacking seconds**, manual winding, and a quick-set day-date mechanism.

Architectural ""7000"" Monocoque Case Design: The reference **5606-7000** is celebrated for its distinctive **""Monocoque"" (one-piece) case construction**. By eliminating a traditional case back, Seiko achieved an exceptionally sleek silhouette and superior resistance to dust and moisture. In **1970**, this design followed the ""Grammar of Design"" principles, featuring razor-sharp lugs and multifaceted surfaces that catch the light with clinical precision, ensuring the watch sat perfectly flush against the wrist.

Masterful ""Weekdater"" Dial Legibility: The dial of the **5606-7000** is a study in functional symmetry, featuring a radiant sunburst silver finish and **hand-applied, multifaceted baton indices**. The dual-calendar window at 3 o'clock houses a **bilingual (English/Kanji) day disk**, which was an essential innovation for the internationalizing Japanese workforce of the era. The applied **""LM"" logo** and the Suwa factory symbol at 6 o'clock remain prestigious hallmarks of this era’s uncompromising mechanical pride.

A Landmark of Suwa's Slim Mechanical Legacy: Produced in **1970**, the 5606-7000 remains a foundational piece for collectors who value the ""Golden Era"" of Suwa Seikosha. It represents the perfect intersection of **mechanical complexity and the minimalist design movement** of the late 1960s. It stands as a testament to an era when Japan proved it could manufacture a high-jewel, ultra-slim automatic that remains as accurate and visually striking today as it was over half a century ago.

For more information, please look at the pictures.

Notes

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