Vintage 1971 JAPAN SEIKO LORD MATIC SPECIAL WEEKDATER 5206-6020 23J Automatic.

Vintage 1971 JAPAN SEIKO LORD MATIC SPECIAL WEEKDATER 5206-6020 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 : 109322.
• Dial number : JAPAN 5206-6020R.
• Glass : Crystal.
• Case size : About 34.7mm.
• Lug width : 18mm.
• Band : New Leather Strap of SEIKO original.

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 Zenith of 1971 Daini Seikosha Engineering (1971): Produced in **1971**, a milestone year of industrial refinement and intense factory competition, the **Seiko Lord Matic Special (LM Special)** represented the absolute pinnacle of mid-tier automatic luxury. Manufactured by the legendary **Daini Seikosha (Kameido)** factory under reference **5206-6020**, this high-grade instrument was explicitly engineered to challenge elite Swiss standards. Positioned as a highly reliable, high-frequency daily dress watch, it captured the proud, forward-looking corporate confidence of the mid-Showa era.

The Legendary Caliber 5206 High-Beat Automatic Engine: This masterpiece is powered by the magnificent **23-jewel Caliber 5206**, a true high-beat automatic engine operating at a swift frequency of **28,800 vibrations per hour (8 beats per second)**. Highly celebrated by horological purists for its superior, over-engineered layout, it served as the technological foundation for the famous ultra-high-grade King Seiko 52-series chronometers. Featuring a robust metal rocker wheel, this movement solved the fragile quick-set weaknesses of other contemporary calibers, ensuring everlasting durability.

The Spontaneous Instantaneous Day-Date Change System: A defining technical masterpiece of the Caliber 5206 is its **""spontaneous"" instant day-date changeover mechanism**. Unlike standard movements where calendar wheels slowly roll over a span of several hours, this highly complex system triggers a crisp, instantaneous jump of both bilingual day and date disks precisely at midnight. This provides clinical legibility and elite micro-engineering satisfaction for the executive lifestyle.

Architectural ""6020"" Flowing Case and Dial Harmony: The reference **5206-6020** is globally sought after for its timeless, organic geometric structure. The solid stainless steel case showcases a beautifully integrated cushion profile with polished surfaces and fluid lines that mirror light with gorgeous vintage warmth. The dial displays a radiant, deep sunburst canvas—often in dark grey, silver, or emerald—adorned with bold applied indices and the proud interlocking applied **""LM"" Special script** at 6 o'clock.

An Investment-Grade Treasure of the Mechanical Golden Age: Manufactured in the pinnacle mechanical year of **1971**, this LM Special remains one of the most highly coveted and technically respected references among serious vintage collectors. It represents the perfect historical intersection where Daini's legendary engineering met 1970s futuristic minimalism and high-utility lifestyle micro-engineering. Built to an uncompromising heirloom standard, it stands as a timeless testament to the golden age of Japanese mechanical design.

For more information, please look at the pictures.

Notes

• Before buying.
  The vintage watches we sell are inspected and adjusted so they work fine. However, since it is an vintage watch, Please purchase on the assumption that it will be repaired.
  
  
• To prevent shipping accidents.
  Please monitor the tracking number until the item arrives and if it stagnates, please investigate at your country post office. Also, please confirm the item when you receive the item.
  
  
• About import taxes.
  Taxes such as import duties and VAT are not included in the item price or shipping charges, except for items shipped to the US. When you purchase, you will likely be required to pay these fees in your country.
  
  
• About Payment, Shipping, Return.
  Payment, Shipping, Return are in accordance with eBay's business policies.