Vintage 1973 JAPAN SEIKO LORD MATIC SP WEEKDATER 5206-6110 25J Automatic.

Vintage 1973 JAPAN SEIKO LORD MATIC SPECIAL WEEKDATER 5206-6110 25Jewels 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 : 340343.
• Dial number : JAPAN5206-6160S.
• Glass : Crystal.
• Case size : About 35.5mm.
• Lug width : 17mm.
• Band : Wrist size that can be worn is Up to about 183mm.

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 1973 Mid-Tier Executive Luxury (1973): Manufactured in **1973**—a milestone historical year during Japan's peak post-war industrial confidence and golden age of mechanical watchmaking—the **Seiko Lord Matic Special (LM Special)** represented the absolute pinnacle of Daini Seikosha's executive daily lineup. Sourced under reference **5206-6110**, this elite ""Special"" variant was positioned directly beneath the King Seiko series, delivering near-chronometer-grade mechanical performance wrapped in striking, forward-looking 1970s Japanese styling.

The Legendary High-Beat 25-Jewel Caliber 5206 Heart: Powering this historic timepiece is the revered **25-jewel Caliber 5206A**, an in-house automatic movement operating at a swift high-beat frequency of **28,800 vibrations per hour (8 beats per second)**. Celebrated by collectors for sharing its mechanical architecture with 52KS King Seiko models, this **25-jewel engine** features **hacking seconds**, hand-winding capability, and a rare **instantaneous day-date change mechanism** that snaps precisely at midnight.

Architectural ""6110"" Angular Case Geometry and Facets: The reference **5206-6110** is globally distinguished among vintage purists for its distinct, muscular case architecture. The solid stainless steel case features sharp, angular facets and broad-shouldered lugs finished with zero-distortion mirror polishing inspired by Taro Tanaka's **""Grammar of Design""** guidelines. This low center-of-gravity engineering allows the mechanical watch to sit completely flush against the wrist, sliding effortlessly under a tailored executive shirt cuff.

Immaculate Dual-Calendar Dial Harmony and Rich Textures: The dial of the **5206-6110** is a masterclass in 1970s visual drama, often featuring vibrant gradient or textured sunburst canvases (such as rich blues or greens). It showcases **hand-applied, multifaceted hour indices** and sharp hands that catch light with high contrast. Balanced at 3 o'clock, the dual-calendar window houses a **bilingual (English/Kanji) day disk** alongside a quick-set date configuration, proudly signed with the applied **""LM Special"" logo** above 6 o'clock.

An Investment-Grade Masterpiece of Kameido's Horological Heritage: Manufactured in the milestone mechanical year of **1973**, the 5206-6110 25-jewel Lord Matic Special remains a highly coveted cornerstone reference for serious vintage Seiko collectors worldwide. It captures the exact historical moment where Daini Seikosha perfected high-beat automatic utility right before the global transition into quartz technology. Built to an uncompromising heirloom standard, it stands as an eternal testament to the golden era of Japanese automatic design.

For more information, please look at the pictures.

Notes

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