Vintage 1970 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7160 23Jewels Automatic.

Vintage 1970 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7160 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 : 0D8488.
• Dial number : JAPAN 5606-7360T.
• Glass : Crystal.
• Case size : About 36.7mm.
• Lug width : 18mm.
• 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.
• For practical, everyday use, it would be advisable to have the movement cleaned and oiled.

Key Features

The Golden Age of the Modern Professional (1970): In **1970**, the **Seiko Lord Matic (LM)** was the definitive status symbol for the high-achieving Japanese ""Salaryman."" The reference **5606-7160** was a mid-range flagship produced by the **Suwa Seikosha** factory, released during a pivotal year when mechanical watchmaking reached its aesthetic and technical maturity just as the Quartz era began to emerge.

The Sophisticated Caliber 5606: This watch is powered by the **23-jewel Caliber 5606**, an automatic movement operating at **21,600 vibrations per hour (vph)**. Known for its slim profile, the 56-series was so highly regarded that it provided the mechanical foundation for both the **King Seiko 56KS** and **Grand Seiko 56GS**. It features premium functions such as **hacking seconds** and manual winding, which were elite specifications in **1970**.

The Robust ""7160"" Grammar of Design: The reference **5606-7160** is a classic example of the **Seiko Style** in its most confident form. The case features sharp, mirror-polished lugs and a broad, flat bezel designed to maximize light reflection. In **1970**, this architectural design was intended to create a ""sparkling"" effect under office lighting, symbolizing the precision and modern professionalism of the wearer.

Versatile ""Weekdater"" Functionality: As a ""Weekdater,"" the **5606-7160** features a dual-calendar window at 3 o'clock with a **bilingual (English/Kanji) day disk**. The dial—often found in a stunning sunburst silver or deep charcoal—is adorned with **hand-applied, multi-faceted baton indices**. This layout prioritized instant legibility, an essential feature for the globalizing Japanese business world of the early 1970s.

A Legacy of Suwa Mechanical Excellence: Produced in **1970**, the reference 5606-7160 remains a highly sought-after piece for vintage collectors. It represents the perfect balance of **mechanical sophistication, slim elegance, and historical significance**, embodying the peak of Suwa Seikosha’s mission to provide high-precision automatic watches to the modern workforce.

For more information, please look at the pictures.

Notes

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