Vintage 1972 JAPAN SEIKO LORD MATIC SPECIAL WEEKDATER 5206-6100 23J Automatic.

Vintage 1972 JAPAN SEIKO LORD MATIC SPECIAL WEEKDATER 5206-6100 23Jewels Automatic.

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

Item description

Movement :

• Pet name : 52 LORD MATIC SPECIAL WEEKDATER.
• Caliber number : 5206A.
• Movement : Automatic.
• Beat rate : 28800bph.
• Year of manufacture start : 1970's.
• Factory : Kameido.

Externals :

• Serial number : 296514.
• Dial number : JAPAN 5206-6120R.
• Glass : Crystal.
• Case size : About 34.97mm.
• 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 High-Beat Zenith of 1972 Daini Executive Luxury (1972): Manufactured in **1972**—a landmark year during Daini Seikosha's peak mechanical innovation era—the **Seiko Lord Matic Special Weekdater** represented the absolute pinnacle of the LM line. Sourced under reference **5206-6100**, this elite ""Special"" iteration was produced by Daini Seikosha to directly challenge Suwa's 56LM series, delivering near-KS level mechanical refinements in a compact executive dress package.

The High-Beat 23-Jewel Caliber 5206 Automatic Heart: Powering this historic instrument is the revered **23-jewel Caliber 5206A**, an in-house automatic engine operating at a swift high-beat frequency of **28,800 vibrations per hour (8 beats per second)**. Highly prized by vintage horology purists, this caliber features **hacking seconds**, smooth manual-winding capability, and Daini's rare **instantaneous day-date calendar mechanism** that snaps crisply at midnight.

Architectural ""6100"" Faceted Case Geometry and Grammar of Design: Sourced in a solid stainless steel case, the reference **5206-6100** showcases aggressive Daini case geometry with razor-sharp facets and sweeping, angular lugs. Built strictly in accordance with Taro Tanaka's **""Grammar of Design""** philosophy, the broad Zaratsu-polished planes create zero-distortion mirror reflections while maintaining a sleek, low-profile wrist presence.

Masterful Dual-Calendar Dial Harmony and ""Special"" Typography: The dial of the **5206-6100** displays clinical mid-century elegance, featuring a radiant silver sunburst canvas set with **hand-applied, multifaceted rectangular block indices** and sharp hands. Symmetrically framed at 3 o'clock, the dual-calendar aperture houses a **bilingual (English/Kanji) day disk** alongside a quick-set date wheel, proudly signed with the applied **""LM"" emblem**, **""Special""** script, and Daini factory lightning bolt logo above 6 o'clock.

An Investment-Grade Masterpiece of Daini's High-Beat Legacy: Produced during the milestone year of **1972**, the 5206-6100 23-jewel Lord Matic Special Weekdater remains one of the most mechanically sophisticated references in the entire LM canon. Combining Daini's 28,800 vph 5200-series platform with sharp Grammar of Design execution, it stands as an essential, investment-grade cornerstone reference for collectors worldwide.

For more information, please look at the pictures.

Notes

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