Vintage 1972 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7190 23Jewels Automatic.

Vintage 1972 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7190 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 : 239777.
• Dial number : JAPAN 5606-7470T.
• Glass : Crystal.
• Case size : About 36.78mm.
• 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 Sovereign Peak of 1972 Executive Prestige (1972): Manufactured in **1972**—a milestone historic year during Japan's peak post-war industrial era and the golden age of mechanical horology—the **Seiko Lord Matic Weekdater** represented the definitive standard of mid-century corporate luxury. Born from the prestigious **Suwa Seikosha** factory under reference **5606-7190**, this flagship model sat directly below the King Seiko series, delivering high-grade mechanical refinement wrapped in forward-looking 1970s Showa-era styling.

The Over-Engineered 23-Jewel Caliber 5606 Automatic Heart: Powering this historic instrument 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 profile and daily stability, this movement features a **23-jewel specification** to control gear-train friction. It incorporates modern executive conveniences including **hacking seconds**, quick-set dual calendar functionality, and smooth manual-winding capability.

Architectural ""7190"" Grammar of Design Case Geometry: The reference **5606-7190** is globally distinguished among vintage collectors for its striking, broad-shouldered case architecture. The solid stainless steel case features sharp, angular facets and sweeping lugs finished with zero-distortion mirror polishing inspired by Taro Tanaka's **""Grammar of Design""** guidelines. This low center-of-gravity engineering allows the watch to sit completely flush against the wrist, sliding weightlessly under a tailored executive shirt cuff.

Masterful ""Weekdater"" Dial Harmony and Bilingual Utility: The dial of the **5606-7190** is a study in 1970s visual balance, showcasing a radiant silver sunburst canvas paired with **hand-applied, multifaceted hour indices** and razor-sharp hands that catch light with high contrast. Positioned neatly at 3 o'clock, the dual-calendar window houses a **bilingual (English/Kanji) day disk** alongside a quick-set date wheel, perfectly anchored by the applied metal **""LM"" emblem** and **""23 JEWELS""** text above 6 o'clock.

An Investment-Grade Masterpiece of Suwa's Automatic Heritage: Manufactured in the milestone mechanical year of **1972**, the 5606-7190 23-jewel Lord Matic Weekdater remains a highly coveted, universally respected cornerstone reference for serious vintage Seiko collectors worldwide. It captures the exact historical moment where Suwa Seikosha perfected high-utility automatic daily instruments right before the global watch industry shifted toward quartz technology. Built to an uncompromising heirloom standard, it stands as an eternal testament to 1970s Japanese horological design.

For more information, please look at the pictures.

Notes

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