Vintage 1972 JAPAN SEIKO LORD MATIC WEEKDATER 5606-5040 23Jewels Automatic.

Vintage 1972 JAPAN SEIKO LORD MATIC WEEKDATER 5606-5040 23Jewels Automatic.

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

Item description

Movement :

• Pet name : 56 LORD MATIC WEEKDATER .
• Caliber No. : 5606A.
• Movement : Automatic.
• Beat rate : 21600bph.
• Year of manufacture start : 1968's.
• Factory : Suwa.

Externals :

• Serial No. : 248055.
• Dial No. : JAPAN 5606-5140T.
• Glass : Acrylic.
• Case size : About 33mm.
• Lug width : 19mm.
• 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 Avant-Garde Luxury (1972): Manufactured in 1972—a landmark historical year during Japan's peak post-war industrial supremacy and the golden mechanical age—the Seiko Lord Matic Weekdater reference 5606-5040 represented Suwa Seikosha's daring exploration into geometric luxury dress watch design. Positioned right below the King Seiko series, this flagship reference offered corporate professionals near-chronometer-grade mechanical performance paired with bold 1970s TV-case styling.
• The Over-Engineered 23-Jewel Caliber 5606 Automatic Heart: Powering this landmark 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 profile and daily rate stability, this movement deploys a lavish 23-jewel specification to minimize gear-train friction, complete with hacking seconds, quick-set dual calendar functionality, and smooth manual-winding capability.
• Architectural ""5040"" TV-Screen Geometry and Grammar of Design: The reference 5606-5040 is globally distinguished among vintage collectors for its iconic rectangular ""TV-screen"" stainless steel case architecture. Executed with sharp angular facets, broad brushed surfaces, and zero-distortion mirror-polished Zaratsu edge bevels inspired by Taro Tanaka's ""Grammar of Design"" principles, the ergonomic case sits remarkably flat, flush, and comfortable against the wrist.
• Masterful ""Weekdater"" Dial Harmony and Bilingual Utility: Framing a distinct geometric dial layout, the 5606-5040 showcases a radiant sunburst canvas set with hand-applied, multifaceted hour indices and sharp hands designed for high-contrast legibility. Symmetrically framed at 3 o'clock, the dual-calendar window houses a bilingual (English/Kanji) day disk alongside the quick-set date wheel, offset by the applied polished ""LM"" emblem above 6 o'clock.
• An Investment-Grade Masterpiece of Suwa's Automatic Heritage: Produced during the milestone mechanical year of 1972, the 5606-5040 23-jewel Lord Matic Weekdater remains a highly sought-after, universally respected cornerstone reference for serious vintage Seiko collectors worldwide. Capturing the precise historical moment where Suwa Seikosha blended cutting-edge case geometry with ultra-thin automatic watchmaking, it stands as an eternal heirloom of Japanese horological history.

For more information, please look at the pictures.

Notes

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