Vintage 1970 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7150 23Jewels Automatic.

Vintage 1970 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7150 23Jewels 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 : 0N7291.
• Dial number : JAPAN 5606-7380R.
• Glass : Crystal.
• Case size : About 37.3mm.
• Lug width : 18mm.
• Band : Wrist size that can be worn is Up to about 200mm.

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.
• For practical, everyday use, it would be advisable to have the movement cleaned and oiled.

Key Features

The Zenith of Executive Style (1970): In **1970**, the **Seiko Lord Matic (LM)** represented the essential luxury for Japan's rising business elite. The reference **5606-7150** was produced by the **Suwa Seikosha** factory during a landmark year when Seiko was redefining the ""High-Standard"" automatic watch. It arrived as a more sophisticated evolution of the early LM series, offering the ambitious Showa-era professional a level of finishing and mechanical reliability that rivaled the elite King Seiko line at a much more accessible price point.

The High-Grade 23-Jewel Caliber 5606 Heart: This watch is powered by the **23-jewel Caliber 5606**, a revolutionary automatic movement operating at **21,600 vibrations per hour (vph)**. In **1970**, the 56-series was a breakthrough in slim-profile architecture, allowing the watch to sit comfortably thin on the wrist. It featured advanced functions such as **hacking seconds**, manual winding capability, and a dual-calendar quick-set—features that established the Lord Matic as a leader in technical convenience for the global executive.

Architectural ""7150"" Case and Modernist Aesthetics: The reference **5606-7150** is celebrated for its sturdy and elegant case design, featuring sharp, mirror-polished surfaces and robust lugs. In **1970**, this design followed the ""Grammar of Design"" principles, emphasizing flat planes and precise angles to maximize light reflection. This specific reference was often paired with the era’s trend for **vibrant sunburst dials**, visually communicating the optimism and high-status energy of Japan’s industrial golden age.

Masterful ""Weekdater"" Dial Symmetry: The dial of the **5606-7150** is a study in functional balance, featuring **hand-applied, multi-faceted baton indices** and the iconic dual-calendar window at 3 o'clock. The inclusion of a **bilingual (English/Kanji) day disk** was a vital innovation in **1970**, prioritizing clarity for the internationalizing Japanese workforce. The applied **""LM"" logo** and the Suwa factory symbol remain prestigious hallmarks of this era’s uncompromising mechanical pride.

A Landmark of Suwa Mechanical Versatility: Produced in **1970**, the 5606-7150 remains a foundational piece for vintage collectors who value the ""Executive"" lineage of Seiko. It represents the perfect intersection of **advanced mechanical engineering and bold 70s design flair**. It stands as a testament to an era when Suwa Seikosha perfected the **""Slim-Profile"" automatic**, creating a reliable and stylish companion 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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