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

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

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Item description

Movement :

• Caliber No. : 0923A.
• Movement : Quartz.
• Year of manufacture start : 1974's.

Externals :

• Serial No. : 722090.
• Dial No. : 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.
  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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