Vintage 1968 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7070 23Jewels Automatic.

Vintage 1968 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7070 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 : 867406.
• Dial number : JAPAN 5606-7070T AD.
• Glass : Crystal.
• Case size : About 37mm.
• 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 Inaugural Benchmark of Lord Matic History (1968): Manufactured in **1968**—the milestone founding year of the entire Lord Matic lineage—the **Seiko Lord Matic Weekdater** reference **5606-7070** represented Suwa Seikosha's groundbreaking answer to the modern executive dress watch. Positioned directly below the King Seiko family, this inaugural-era 56LM reference combined high-utility dual-calendar functionality with sharp, early ""Grammar of Design"" styling.

The Revolutionary Ultra-Slim 23-Jewel Caliber 5606 Engine: Powering this historic timepiece is the inaugural **23-jewel Caliber 5606A**, operating at a steady frequency of **21,600 vibrations per hour (vph)**. Celebrated for its exceptionally thin architectural profile that enabled sleek case dimensions, this in-house engine introduced key modern conveniences including **hacking seconds**, quick-set day/date operation, and smooth manual-winding capability.

Architectural ""7070"" Monocoque Case Geometry and Facets: The reference **5606-7070** is globally distinguished among vintage Seiko collectors for its front-loading **monocoque (one-piece) stainless steel case** with no traditional case back. Built strictly in accordance with Taro Tanaka's **""Grammar of Design""** philosophy, the case features flat, zero-distortion Zaratsu-polished planes, broad sweeping lugs, and a low center of gravity that rests flush against the wrist.

Masterful Dual-Calendar Dial Harmony and Visual Symmetry: The dial of the **5606-7070** is a masterclass in late-1960s visual restraint, displaying a radiant silver sunburst canvas decorated with **hand-applied, multifaceted rectangular block indices** with fine black center lines. Positioned symmetrically at 3 o'clock, the dual-calendar aperture houses a **bilingual (English/Kanji) day disk** alongside the date wheel, offset by the applied polished **""LM"" emblem** above 6 o'clock.

An Investment-Grade Founding Milestone of Suwa's Heritage: Produced during the inaugural production run of the 56LM series in **1968**, the 5606-7070 Lord Matic Weekdater remains an essential, universally respected cornerstone reference for serious vintage Seiko purists. It captures the exact historical moment where Suwa Seikosha perfected daily-wear executive elegance during the golden age of mechanical horology.

For more information, please look at the pictures.

Notes

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