Vintage 1968 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7050 23Jewels Automatic.

Vintage 1968 JAPAN SEIKO LORD MATIC WEEKDATER 5606-7050 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 : 851326.
• Dial number : JAPAN 5606-7110T AD.
• Glass : Acrylic.
• Case size : About 35.81mm.
• Lug width : 19mm.
• Band : New Leather Strap.

Condition :

• Used, it runs well.
• Quick set(Day/Date) : Okay.
  Day of the week can be set 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 Dawn of Lord Matic Executive Luxury (1968): Manufactured in **1968**—the landmark founding year of the entire Lord Matic lineage—the **Seiko Lord Matic Weekdater** reference **5606-7050** represented Suwa Seikosha's groundbreaking answer to modern executive needs. Created to bridge the gap between middle-tier daily wearers and the flagship King Seiko series, this first-generation 56LM model set the technological template for post-war Japanese business dress watches.

The Revolutionary Ultra-Slim 23-Jewel Caliber 5606 Engine: Powering this historic timepiece is the inaugural **23-jewel Caliber 5606A**, an in-house automatic engine operating at **21,600 vibrations per hour (vph)**. Celebrated for its ultra-thin architectural construction that drastically reduced overall watch thickness, this movement incorporated essential executive functions including **hacking seconds**, quick-set dual-calendar adjustment, and manual-winding capability.

Architectural ""7050"" Monocoque Case Geometry: Sourced under reference **5606-7050**, this model features a coveted front-loading **monocoque (one-piece) stainless steel case** with no traditional removable case back. Built in strict accordance with Taro Tanaka's **""Grammar of Design""** principles, the broad, sweeping lugs, razor-sharp facets, and zero-distortion Zaratsu-polished planes create a low center of gravity that sits completely flush on the wrist.

Masterful Dual-Calendar Dial Harmony and Visual Symmetry: The dial of the **5606-7050** is a study in late-1960s visual restraint, showcasing a radiant silver sunburst background decorated with **hand-applied, multifaceted rectangular block indices** with dark center inserts. Symmetrically framed at 3 o'clock, the dual-calendar window houses a **bilingual (English/Kanji) day disk** alongside the date wheel, perfectly offset by the applied polished **""LM"" emblem** above 6 o'clock.

An Investment-Grade Founding Milestone of Suwa's Heritage: As an original 1968 launch-year reference for the legendary 56LM series, the 5606-7050 holds immense historical weight for vintage Seiko purists. Combining an unyielding monocoque Grammar of Design case with the landmark 5606 caliber, it stands as an indispensable, investment-grade cornerstone reference for collectors worldwide.

For more information, please look at the pictures.

Notes

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