Vintage 1970 JAPAN SEIKO LORD MATIC WEEKDATER 5606-8010 23Jewels Automatic.

Vintage 1970 JAPAN SEIKO LORD MATIC WEEKDATER 5606-8010 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 : 073674.
• Dial number : JAPAN 5606-8010S.
• Glass : Acrylic.
• Case size : About 36.17mm.
• Lug width : 19mm.
• Band : New Leather Strap of SEIKO original.

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 Sovereign Benchmark of 1970 Executive Luxury (1970): Manufactured in **1970**—a milestone historical year defined by Osaka Expo '70 and Japan's peak post-war industrial supremacy—the **Seiko Lord Matic Weekdater** reference **5606-8010** stood as the definitive benchmark of accessible executive prestige. Born from the prestigious **Suwa Seikosha** factory, this flagship model sat directly below the King Seiko series, delivering high-grade mechanical performance wrapped in striking, forward-looking 1970s Showa-era styling.

The High-Performance 23-Jewel Caliber 5606 Automatic Heart: Powering this historic timepiece is the revered **23-jewel Caliber 5606**, an in-house automatic engine operating at a smooth frequency of **21,600 vibrations per hour (vph)**. Celebrated by vintage purists for its remarkably thin architectural profile and daily rate stability, this caliber deployed a refined **23-jewel specification** to minimize gear-train friction, complete with **hacking seconds**, quick-set dual calendar control, and manual-winding capability.

Architectural ""8010"" Cushion Case Geometry and Contours: The reference **5606-8010** is globally distinguished among vintage collectors for its distinct, broad-shouldered cushion case architecture. Executed in solid stainless steel, the case features sweeping, organic contours and integrated lug shoulders finished with zero-distortion mirror polishing inspired by Taro Tanaka's **""Grammar of Design""** guidelines, allowing it to sit completely flush and comfortable against the wrist.

Masterful ""Weekdater"" Dial Harmony and Bilingual Utility: The dial of the **5606-8010** showcases exemplary 1970s visual balance, displaying a radiant silver sunburst canvas decorated with **hand-applied, multifaceted rectangular block indices** and razor-sharp hands. Symmetrically framed at 3 o'clock, the dual-calendar window houses a **bilingual (English/Kanji) day disk** alongside a quick-set date configuration, accompanied by the applied **""LM"" emblem** above 6 o'clock.

An Investment-Grade Masterpiece of Suwa's Automatic Heritage: Manufactured in the milestone mechanical year of **1970**, the 5606-8010 23-jewel Lord Matic Weekdater remains a highly sought-after, universally respected cornerstone reference for serious vintage Seiko purists. Capturing the precise historical moment where Suwa Seikosha perfected high-utility automatic daily instruments before the industry shifted toward digital quartz technology, it stands as an eternal heirloom of Japanese horology.

For more information, please look at the pictures.

Notes

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