Vintage 1970 JAPAN SEIKO LORD MATIC CALENDAR 5605-7020 25Jewels Automatic.

Vintage 1970 JAPAN SEIKO LORD MATIC CALENDAR 5605-7020 25Jewels Automatic.

Welcome to my auction!
I am Japanese who live in Tokyo.

Item description

Movement :

• Pet name : 56 LORD-MATIC CALENDAR.
• Caliber number : 5605A.
• Movement : Automatic.
• Beat rate : 21600bph.
• Year of manufacture start : 1968's.
• Factory : Suwa.

Externals :

• Serial number : 018757.
• Dial number : JAPAN 5605-7001T AD.
• Glass : Acrylic.
• Case size : About 34.82mm.
• Lug width : 18mm.
• Band : Wrist size that can be worn is Up to about 190mm.

Condition :

• Used, it runs well.
• Quick set(Day/Date) : Okay.
  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 Sovereign Peak of 1970 Date-Only Executive Luxury (1970): Manufactured in **1970**—a monumental historic year defined by Osaka Expo '70 and Japan's peak post-war industrial sophistication—the **Seiko Lord Matic Calendar** reference **5605-7020** represents an exceptionally clean, date-only executive flagship from Suwa Seikosha. Positioned directly beneath the King Seiko series, this model was tailored for discerning professionals who sought high-grade automatic precision paired with streamlined dial symmetry.

The Over-Engineered 25-Jewel Caliber 5605 Automatic Heart: Powering this historic timepiece is the rare **25-jewel Caliber 5605**, the dedicated date-only variant of the legendary 56-series movement family. Operating at a smooth frequency of **21,600 vibrations per hour (vph)**, it features **hacking seconds**, quick-set date operation, and smooth manual-winding capability. The elevated 25-jewel specification deployed synthetic rubies across gear-train pivots to minimize mechanical friction and ensure long-term daily stability.

Architectural ""7020"" Grammar of Design Case Geometry: The reference **5605-7020** is globally celebrated among vintage purists for its textbook adherence to Taro Tanaka's **""Grammar of Design""** guidelines. The solid stainless steel case features flat, zero-distortion mirror-polished Zaratsu facets, razor-sharp lug bevels, and broad-shouldered geometric angles. This low center-of-gravity engineering allows the watch to sit remarkably flush against the wrist, sliding effortlessly under a tailored executive shirt cuff.

Immaculate Date-Only Dial Symmetry and Visual Balance: The dial of the **5605-7020** is a masterclass in late-Showa visual restraint. Set against a radiant silver sunburst canvas, it features **hand-applied, multifaceted rectangular block indices** with fine black insert accents and razor-sharp hands. Free from day-window clutter, the neatly framed date aperture at 3 o'clock is perfectly balanced by the applied metal **""LM"" emblem** and Suwa factory logo above 6 o'clock.

An Investment-Grade Masterpiece of Suwa's Automatic Heritage: Produced during the milestone mechanical year of **1970**, the 5605-7020 25-jewel Lord Matic Calendar remains an uncommonly seen, highly respected cornerstone reference for serious vintage Seiko collectors worldwide. Combining an uncompromising Grammar of Design case with the rare 5605 date-only movement architecture, it stands as an eternal testament to 1970s Japanese horological design.

For more information, please look at the pictures.

Notes

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