Vintage 1971 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7000 23Jewels Automatic.

Vintage 1971 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7000 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. : 133916.
• Dial No. : JAPAN 5606-7001S.
• Glass : Acrylic.
• Case size : About 36.4mm.
• Lug width : 19mm.
• Band : Wrist size that can be worn is Up to about 200mm.

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 1971 Executive Luxury (1971): Manufactured in 1971—a monumental historical year during Japan's peak post-war industrial supremacy and the height of mechanical innovation—the Seiko Lord Matic Weekdater reference 5606-7000 represented Suwa Seikosha's definitive accessible executive dress watch. Positioned directly below the King Seiko hierarchy, this flagship reference offered corporate professionals high-grade mechanical reliability wrapped in refined Showa-era 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 ""7000"" Grammar of Design Monocoque Case: The reference 5606-7000 is globally distinguished among vintage collectors for its early front-loading (one-piece monocoque) stainless steel case architecture. Engineered with zero-distortion mirror-polished Zaratsu planes, sharp faceted lugs, and a sleek, low-profile bezel according to Taro Tanaka's ""Grammar of Design"" principles, the case rests remarkably flat, flush, and balanced against the wrist.
• Masterful ""Weekdater"" Dial Harmony and Bilingual Utility: The dial of the 5606-7000 showcases exemplary early-1970s visual balance, featuring a radiant silver sunburst canvas decorated with hand-applied, multifaceted rectangular block indices and sharp hands 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 1971, the 5606-7000 23-jewel Lord Matic Weekdater remains an exceptionally clean, highly sought-after cornerstone reference for serious vintage Seiko collectors worldwide. Capturing the precise historical moment where Suwa Seikosha perfected ultra-thin, high-utility automatic dress watches right before the industry shifted toward quartz technology, it stands as an eternal heirloom of Japanese horology.

For more information, please look at the pictures.

Notes

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