Vintage 1969 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7120 25Jewels Automatic.

Vintage 1969 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7120 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 : 9D1039.
• Dial number : JAPAN 5606-7240S.
• Glass : Acrylic.
• Case size : About 38mm.
• Lug width : 12mm.
• Band : Wrist size that can be worn is Up to about 210mm.

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.
  Power reserve is automatic only and can not be done with 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 Spirit of 1969 Modernist Corporate Culture (1969): In **1969**—a monumental historic year highlighted by global technological breakthroughs and Japan's peak post-war industrial confidence—the **Seiko Lord Matic (LM)** series served as a premier timekeeping statement. The reference **5606-7120** was produced by the **Suwa Seikosha** factory to capture the exciting, forward-thinking lifestyle shifts of the late 1960s. Explicitly designed for young corporate leaders and progressive professionals, it successfully provided a sharp, geometric statement that defined the peak of the mechanical era.

The Premium Upgraded 25-Jewel Caliber 5606 Heart: This watch is powered by the rare, high-grade **25-jewel Caliber 5606**, an ultra-slim automatic movement operating at a stable daily frequency of **21,600 vibrations per hour (vph)**. While standard mainstream Lord Matic models utilized a 23-jewel layout, this elite **25-jewel specification** was reserved for premium factory runs, deploying extra synthetic rubies to minimize gear-train friction and ensure extreme long-term daily stability. It features executive functions like **hacking seconds** and manual-winding capability.

Architectural ""7120"" Sharp Grammar of Design Case Mastery: The reference **5606-7120** is highly celebrated among vintage purists for its flawless implementation of Taro Tanaka's foundational **""Grammar of Design""** philosophy. The solid stainless steel case features incredibly sharp, angular facets and robust, beautifully tapered straight lugs finished with zero-distortion mirror polishing and precise contrasting brushed textures. This low center-of-gravity architecture allowed the mechanical structure to sit entirely flush against the skin, sliding completely weightless under a tailored corporate cuff.

Masterful ""Weekdater"" Dial Legibility and Balance: The dial of the **5606-7120** is a study in clinical mid-century luxury, showcasing a radiant silver sunburst canvas decorated with **hand-applied, multifaceted chunky block indices**. The dual-calendar window at 3 o'clock houses a **bilingual (English/Kanji) day disk**, prioritizing instant split-second legibility for the globalizing Japanese workforce. The applied, interlocking **""LM"" emblem** and the Suwa lightning bolt insignia at 6 o'clock remain proud hallmarks of pure manufacturing pride.

A Landmark Milestone of Suwa's High-Spec Legacy: Produced in the milestone year of **1969**, the 5606-7120 25-jewel variant remains a highly coveted, investment-grade reference for serious collectors who value the **""Mechanical Golden Age.""** It represents the perfect historical intersection where rugged daily durability met late-1960s geometric minimalism and elite, high-jewel micro-engineering right before the full quartz transition. It stands as a profound testament to an era when Suwa Seikosha built mechanical dress watches to an uncompromising industrial standard.

For more information, please look at the pictures.

Notes

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