Vintage 1972 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7151 23Jewels Automatic.

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

Item description

It's a SEIKO Automatic Watch, LORD MATIC WEEKDATER 5606-7151 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 : 288324.
  • Dial number : JAPAN 5606-7360R.
  • Glass : Crystal.
  • Case size : About 36.9mm.
  • Lug width : 18mm.
  • Band : Wrist size that can be worn is Up to about 192mm.
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 Spirit of 1972 Modernist Corporate Culture (1972): In **1972**, a landmark year highlighted by the Sapporo Winter Olympics and Japan's peak post-war industrial confidence, the **Seiko Lord Matic (LM)** series entered a bold new era of artistic expression. The reference **5606-7151** was produced by the **Suwa Seikosha** factory to capture the exciting, forward-thinking lifestyle shifts of the early 1970s. Explicitly designed for young corporate leaders and progressive design enthusiasts, it successfully replaced traditional round profiles with an energetic, futuristic geometric statement that defined the peak of the mechanical era.
  • The Proven 23-Jewel Caliber 5606 Heart: This watch is powered by the famous **23-jewel Caliber 5606**, an ultra-slim high-grade automatic movement operating at **21,600 vibrations per hour (vph)**. The 56-series is world-renowned among vintage purists for its innovative low-profile architecture, allowing Seiko to build more ergonomic and sleek dress profiles without sacrificing structural stability. Featuring premium corporate functions such as a **seconds-hacking mechanism**, manual winding capability, and a robust dual-calendar display, this caliber remains a masterclass in daily reliability.
  • Architectural ""7151"" Fluid Tonneau-Cushion Case: The reference **5606-7151** is celebrated among vintage purists for its distinctively stylish **tonneau-cushion case geometry**. Departing from traditional circular shapes, the stainless steel case features wide, fluidly integrated lugs and beautifully contoured, sweeping facets that perfectly implement Taro Tanaka's **""Grammar of Design""** principles. This low center-of-gravity architecture minimized wrist fatigue while creating a bold, distinctly retro-modern presence that slid effortlessly under a tailored suit cuff.
  • Masterful ""Weekdater"" Dial Legibility and Purity: The dial of the **5606-7151** is a study in clinical mid-century luxury, showcasing a radiant silver sunburst canvas decorated with **hand-applied, multifaceted block indices** with dark contrast inserts. The dual-calendar window at 3 o'clock houses a **bilingual (English/Kanji) day disk**, prioritizing split-second legibility for a globalizing Japanese workforce. The perfectly symmetrical applied **""LM"" interlocking emblem** and the Suwa lightning bolt insignia at 6 o'clock remain proud badges of pure industrial craftsmanship.
  • A Cornerstone of Suwa's Everyday Executive Legacy: Produced in the milestone year of **1972**, the 5606-7151 remains a highly coveted, investment-grade reference for collectors who value the **""Mechanical Golden Age.""** It represents the perfect historical intersection where rugged daily durability met early-1970s geometric minimalism and elite micro-engineering. It stands as a profound testament to an era when Suwa Seikosha built mechanical dress watches to an indestructible, uncompromised industrial standard that effortlessly transcends passing horological trends.
    • For more information, please look at the pictures.
    Notes
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