Vintage 1968 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7020 25Jewels Automatic.

Vintage 1968 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7020 25Jewels 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 No. : 835328.
• Dial No. : JAPAN 5606-7020S AD.
• Glass : Acrylic.
• Case size : About 35mm.
• 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.
  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 Dawn of the Iconic Lord Matic Series (1968): Manufactured in 1968—a monumental historical year during Japan's mid-Showa industrial expansion—the Seiko Lord Matic Weekdater reference 5606-7020 represents an essential first-year milestone of the Lord Matic lineage. Born from the prestigious Suwa Seikosha facility, this flagship model debuted to offer rising executives near-chronometer-grade mechanical sophistication paired with cutting-edge Showa dress architecture.
• The Elevated 25-Jewel Caliber 5606 Automatic Heart: Powering this historic instrument is the elevated 25-jewel Caliber 5606, an in-house automatic engine operating at a smooth frequency of 21,600 vibrations per hour (vph). Highly prized by vintage purists for its ultra-thin profile and long-term daily stability, this movement deploys an upgraded 25-jewel specification to minimize gear-train wear, complete with hacking seconds, quick-set dual calendar control, and manual-winding capability.
• Architectural ""7020"" Grammar of Design Case Geometry: The reference 5606-7020 is globally distinguished among vintage Seiko collectors for its crisp execution of Taro Tanaka's ""Grammar of Design"" principles. Executed in solid stainless steel, the case features sharp, angular faceted lugs and zero-distortion mirror-polished Zaratsu planes that capture light with extreme contrast while allowing the low-profile case to sit completely flush against the wrist.
• Masterful ""Weekdater"" Dial Harmony and Bilingual Utility: The dial of the 5606-7020 showcases exemplary late-1960s visual balance, featuring a radiant silver sunburst canvas decorated with hand-applied, multifaceted rectangular block indices and sharp hands. Symmetrically framed at 3 o'clock, the dual-calendar window houses a bilingual (English/Kanji) day disk alongside a quick-set date wheel, offset by the applied polished ""LM"" emblem and ""25 JEWELS"" designation above 6 o'clock.
• An Investment-Grade Masterpiece of Suwa's Automatic Heritage: Manufactured during the introductory release year of 1968, the 5606-7020 25-jewel Lord Matic Weekdater remains an exceptionally clean, highly coveted reference for serious vintage Seiko enthusiasts worldwide. Capturing the exact moment where Suwa Seikosha revolutionized 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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