Vintage 1971 JAPAN SEIKO LORD MATIC WEEKDATER 5606-5040 23Jewels Automatic.

Vintage 1971 JAPAN SEIKO LORD MATIC WEEKDATER 5606-5040 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 : 174292.
• Dial number : JAPAN 5606-5160T.
• Glass : Acrylic.
• Case size : About 32.8mm.
• Lug width : 19mm.
• Band : Wrist size that can be worn is Up to about 190mm.

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 Spirit of 1972 Avant-Garde Showa Styling (1972): In **1972**, a historic year highlighted by the Sapporo Winter Olympics and Japan's booming mid-century cultural modernization, the **Seiko Lord Matic (LM)** series entered a bold new era of artistic expression. The reference **5606-5040** was produced by the **Suwa Seikosha** factory to capture the exciting, forward-thinking lifestyle shifts of the early 1970s. Explicitly designed for young corporate leaders and progressive design enthusiasts, it successfully replaced traditional round profiles with an energetic, futuristic geometric statement that defined the peak of the mechanical era.

The Ultra-Slim 23-Jewel Caliber 5606 Heart: This watch is powered by the legendary **23-jewel Caliber 5606**, a high-grade automatic movement operating at **21,600 vibrations per hour (vph)**. Highly regarded for its advanced, low-profile mainplate architecture, this 56-series engine allowed Seiko to build complex, non-circular designer cases without making the watch bulky. It features premium executive utilities of the period, including a **seconds-hacking mechanism** for precise time synchronization, manual-winding capability, and a robust integrated day-date display.

Architectural ""5040"" Retro-Futuristic Square TV Case: The reference **5606-5040** is globally celebrated among vintage purists for its iconic, striking **Square ""TV-Screen"" case geometry**. Departing entirely from traditional shapes, the solid stainless steel case features broad, integrated hooded lugs and beautifully brushed flat surfaces contrasted by mirror-polished outer facets that implement Taro Tanaka's **""Grammar of Design""** in a bold, square format. This low center-of-gravity architecture sits perfectly flush on the wrist, offering an unmistakable and powerful retro-modern presence.

Masterful ""Weekdater"" Dial with Deep Color Gradation: The dial of the **5606-5040** is a study in 1970s dimensional art, frequently showcasing stunning **deep, metallic color-gradations (such as emerald green, royal blue, or charcoal sunburst)** that shift beautifully under light. It is decorated with **hand-applied, thick multifaceted block indices** positioned at unique angles to fit the square canvas. The framed dual-calendar window at 3 o'clock houses a **bilingual (English/Kanji) day disk**, perfectly complementing the proud, applied interlocking **""LM"" emblem** at 6 o'clock.

A Cornerstone Milestone of Suwa's Geometric Legacy: Manufactured in the milestone year of **1972**, the 5606-5040 remains an investment-grade cornerstone reference for collectors who value the intersection of fine art and mechanical horology. It represents the crucial historical turning point where rugged everyday durability met early 1970s pop-art minimalism and high-utility micro-engineering right before the full onset of the quartz transition. It stands as a profound testament to an era when Japan built mechanical lifestyle watches to an indestructible, uncompromised industrial standard.

For more information, please look at the pictures.

Notes

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