Vintage Watch | Grand Seiko 5646 7010

Vintage Grand Seiko 56GS 5646-7000 | A Swiss Defying Masterpiece  

Step into horological history with this Vintage Grand Seiko 56GS 5646-7000, a masterpiece from Seiko’s golden era of the 1970s. Renowned for its precision, elegance, and groundbreaking engineering, this timepiece embodies Seiko’s audacious challenge to Swiss dominance, cementing Japan’s legacy in luxury watchmaking. A cornerstone of the Vintage Grand Seiko lineage, the 56GS series introduced Seiko’s first automatic movements and remains a collector’s holy grail for its rarity and technical brilliance.  

Precision and Craftsmanship

1. Historic Hi-Beat Movement:
Powered by Seiko’s revolutionary 28,800 bph Hi-Beat Caliber 5646, this Chronometer-rated movement triumphed in Swiss competitions, delivering unmatched accuracy. Its high-frequency design ensures smoother seconds-hand motion and durability—a hallmark of **Grand Seiko 56** engineering.  

2. Timeless Grammar of Design:
The 5646-7000 showcases Seiko’s iconic “Grammar of Design” philosophy: a mirror-polished, multi-dimensional case with sharp angles, a brushed finish, and a sleek 36mm profile. This avant-garde 1970s aesthetic influenced modern dive watches while retaining timeless dress-watch sophistication.  

3. Collector-Grade Condition:
- Dial: Pristine white dial with zero signs of aging.  
- Case: Mint-condition mirror finish, preserving its original multi-dimensional contours (36mm diameter, 42mm lug-to-lug).  
- Medallion: Original caseback gold medallion with subtle patina, honoring its 50+ year legacy. Som aging is found on the medallion, but it does not stop its charm.
- Crystal: Flawless original glass.  

4. Rare Flexibility: 
One of the most versatile 56GS models, the 5646-7000 was produced in no-date, date-only, and day-date configurations. Its automatic movement marked a pivotal shift in Seiko’s production, rivaling even the celebrated 61GS series.  

Technical Mastery
Born from Seiko’s 1960s “Chronometer Wars,” the Grand Seiko 56 line refined technology honed in Swiss competitions. The 5646 movement’s 28,800 bph frequency (a “high beat” by 1970s standards) ensured precision that outperformed contemporaries, while its robust construction guaranteed longevity—a testament to Japan’s engineering prowess.  

Own a Chapter of Horology History

The Vintage Grand Seiko 56GS isn’t just a watch—it’s a symbol of Japan’s rise to watchmaking supremacy. With its Chronometer heritage, iconic design, and collector-ready preservation, this timepiece bridges decades of craftsmanship. Elevate your collection with a legend that continues to defy time.  

Specification:

Maker: Seiko

Model: 5646 - 7010

Era: 1972 Jul

Case Diameter: 36 mm

Lug to Lug: 42 mm

Lug Width: 18 mm

Case Condition: In MINT condition, with the original mirror finish retain on the case and the case is sharp 

Glass: The watch retained its original crystal is in nice condition

Dial Condition: Clean White dial with a minor aging spot between 10-11 o'clock near edge of case. It is barely visible in normal daylight 

Movement: Fully Functioning Automatic Hi-Beat Movement 28,800bph

And of course, it comes with any colour of the Kyoto Series straps we offer in the store. Just let us know which one you like to pair the beauty up with.