Vintage 1977 JAPAN SEIKO SilverWave 0923-7010 9Jewels Quartz.

Vintage 1977 JAPAN SEIKO SilverWave 0923-7010 9Jewels Quartz.

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

Item description

Movement :

• Caliber number : 0923A.
• Movement : Quartz.
• Year of manufacture start : 1974's.

Externals :

• Serial number : 722090.
• Dial number : JAPAN 0923-8010T.
• Glass : Crystal.
• Case size : About 36.8mm.
• Lug width : 18mm.
• Band : Wrist size that can be worn is Up to about 210mm.

Condition :

• Used, it runs well. Battery replaced
• Quick set(Day/Date) : Okay.
  Set the day of the week can be in English or Kanji.(English only: Black text and blue text.)
  Set of the date : The set at one stage pulling the crown.
• Approximate watch rate at Japan : Quartz.
• For practical, everyday use, it would be advisable to have the movement cleaned and oiled.

Key Features

The High-Grade Dawn of 1977 SilverWave Quartz Heritage (1977): Manufactured in **1977**—during Suwa Seikosha's aggressive expansion of high-reliability quartz timepieces—the **Seiko SilverWave** reference **0923-7010** represents the modern evolution of Seiko's legendary water-resistant sports-dress line. Originally born in the 1960s as a mechanical diver-adjacent dress watch, the SilverWave platform in the late 1970s combined robust sports architecture with early high-precision solid-state quartz tech.

The Over-Engineered 9-Jewel Caliber 0923 Quartz Heart: Powering this historic timepiece is the robust **9-jewel Caliber 0923A**, an early high-grade quartz movement operating at **32,768 Hz**. Incorporating an unusually high **9-jewel count** for a 1970s quartz engine to reduce mechanical wheel train wear, this Suwa movement features a quick-set dual-calendar assembly, hacking second-hand function, and an impressive factory-rated accuracy of **±15 seconds per month**.

Architectural ""7010"" Screw-Down Case and SilverWave Geometry: Sourced in a heavy-duty solid stainless steel case, the reference **0923-7010** is engineered for high durability with its reinforced **screw-down case back** and protected crown layout. Adhering to late-1970s Tanaka **""Grammar of Design""** principles, the case features thick, sweeping lug shoulders and flat Zaratsu-polished planes that provide a commanding, low-profile stance on the wrist.

Masterful Dual-Calendar Dial Harmony and Iconic Wave Insignia: The dial of the **0923-7010** exhibits exceptional visual clarity, set against a radiant silver sunburst canvas decorated with **hand-applied, multifaceted rectangular block indices**. Framed symmetrically at 3 o'clock, the dual-calendar aperture houses a **bilingual (English/Kanji) day disk** alongside a quick-set date wheel, proudly anchored by the applied metal **SilverWave tsunami wave emblem** above 6 o'clock.

An Investment-Grade Pillar of Suwa's Quartz Sports Lineage: Produced during the prime golden decade of Japanese quartz innovation in **1977**, the 0923-7010 9-jewel SilverWave stands as a highly coveted, universally respected cornerstone reference. It captures the vital historical bridge where Seiko's rugged tool-watch construction seamlessly merged with top-tier early quartz micro-engineering.

For more information, please look at the pictures.

Notes

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