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Model History:
The Grand Seiko 5646-7010 represents a milestone in Seiko's high-precision watchmaking from the early 1970s. Belonging to the revered 56GS series, this model was equipped with a hi-beat movement, capable of 28,800 beats per hour—an impressive achievement for its time. The 5646 caliber also introduced quickset day-date functionality and hacking seconds, catering to professionals seeking both elegance and functionality. Its subtle "GS" branding and gold medallion caseback symbolize Seiko’s quiet confidence in competing against Swiss chronometers.
Functions: Day (English/Kanji) & date, hacking seconds, quickset
Case: Stainless steel
Diameter: approx. 36 mm without crown, 37.5 mm with crown
Lug width: 18 mm
Crystal: New, scratch-free acrylic
Dial: Champagne sunburst with applied indices and GS logo
Strap: New black leather strap
No box or papers
Condition:
The watch has been freshly serviced, with a newly replaced balance wheel ensuring excellent performance and timekeeping. All functions operate flawlessly. The dial is in very nice condition, with clean sunburst finish and intact applied markers. The case shows signs of wear consistent with age but remains in very presentable shape. New acrylic crystal and leather strap complete the overall elegant appearance.
