Vintage 1968 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7000 23Jewels Automatic.

Vintage 1968 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 number : 5606A.
• Movement : Automatic.
• Beat rate : 21600bph.
• Year of manufacture start : 1968's.
• Factory : Suwa.

Externals :

• Serial number : 873752.
• Dial number : JAPAN 5606-7000R AD.
• Glass : Acrylic.
• Case size : About 35.5mm.
• Lug width : 19mm.
• Band : Wrist size that can be worn is Up to about 185mm.

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 Inaugural Benchmark of Lord Matic History (1968): Manufactured in **1968**—a historic turning point that marked the official debut of the Lord Matic line—the reference **5606-7000** stands as the ultimate ""first generation"" founding reference of Suwa Seikosha’s iconic LM series. Positioned directly below the King Seiko range, this model pioneered high-utility executive luxury for the modern post-war workforce.

The Revolutionary Ultra-Slim 23-Jewel Caliber 5606 Engine: Powering this landmark model is the inaugural **23-jewel Caliber 5606A**, operating at **21,600 vibrations per hour (vph)**. Engineered with an exceptionally thin profile that allowed Lord Matic watches to achieve unprecedented sleekness, this movement introduced modern executive necessities including **hacking seconds**, quick-set day/date calendar control, and smooth hand-winding capability.

Purest ""Grammar of Design"" One-Piece Monocoque Case: Sourced under reference **5606-7000**, this reference features a rare front-loading **monocoque (one-piece) stainless steel case** with no traditional case back. Built strictly according to Taro Tanaka’s **""Grammar of Design""** rules, the sweeping lugs, flat mirror-polished Zaratsu planes, and low center of gravity allow the watch to sit completely flush against the wrist.

Symmetrical Dual-Calendar Dial Harmony: The dial of the **5606-7000** is a masterclass in late-1960s visual balance. Set against a radiant silver sunburst background, it displays **hand-applied, multifaceted rectangular block indices** with black center inserts and razor-sharp hands. Symmetrically framed at 3 o'clock, the dual calendar window houses a **bilingual (English/Kanji) day disk** alongside the date wheel, offset by the polished applied **""LM"" emblem** above 6 o'clock.

Historical Milestone of Suwa's Automatic Heritage: As the pioneer reference that birthed the legendary 56LM family in **1968**, the 5606-7000 holds unmatched historical significance for vintage Seiko purists. Combining an uncompromising monocoque Grammar of Design case with the inaugural 5606 movement, it remains an essential, investment-grade cornerstone reference for collectors worldwide.

For more information, please look at the pictures.

Notes

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