Grand Seiko 9587-8000 – Ultra Flat Quartz (November 1979, Original band, freshly serviced)

This elegant Grand Seiko 9587-8000 is one of the brand's early high-end quartz models and exemplifies Seiko's technological and design aspirations in the late 1970s.

With a case height of just 7 mm, it is exceptionally flat and perfectly embodies the philosophy of the Grand Seiko quartz line of that era: maximum precision in an extremely slim, wearable format.

Manufacturing Period

Serial number starts with: 9Nxxxxx

• "9" = 1979
• "N" = November

➡️ Production: November 1979

Historical Classification

The reference 9587-8000 belongs to the first generation of high-quality Grand Seiko quartz movements after the quartz revolution.

Key features of this era:

• Development of high-precision quartz calibers as a new benchmark
• Focus on slim design ("Ultra Thin")
• Application of Grand Seiko design principles to quartz models

The 95xx calibers represent a phase where Seiko was technologically world-leading and positioned quartz as a premium segment.

Design

• Silver-colored sunburst dial
• Applied, faceted indices
• Precisely crafted hands
• Date display at 3 o'clock
• Integrated case/bracelet design typical of the late 1970s

The extreme flatness gives the watch a very elegant, almost "leaf-like" presence on the wrist.

Technical Data

Brand: Seiko
Line: Grand Seiko
Reference: 9587-8000

Production Date: November 1979

Movement: Quartz (Grand Seiko 95xx series)

Functions:
Time, Date

Case: Stainless Steel

Dimensions:
Diameter: approx. 37 mm (without crown)
Height: approx. 7 mm
Lug-to-Lug: approx. 41 mm

Bracelet: Original Grand Seiko stainless steel bracelet

Weight: 80 g

Crown: Original GS crown (logo damaged)

Condition

• Overall good vintage condition
• Fully serviced in Japan in October 2025
• Case with normal age-related signs of wear
• Original GS bracelet in good condition
• Dial with slight patina on the outer edge (visually harmonious)
• GS logo on the crown slightly damaged
• Overall harmonious, authentic impression

Classification & Collector's Perspective

This reference is particularly interesting due to:

• Early Grand Seiko quartz technology
• Extremely flat design
• Classic integrated 1970s design
• Original GS bracelet
• Documented fresh overhaul

The combination of ultra-thin profile + fresh overhaul makes it a very easily wearable vintage Grand Seiko.

Historical Context: Grand Seiko

Grand Seiko was founded in 1960 with the goal of producing the most precise and finely crafted watches in Japan.

After the quartz revolution, Seiko consistently applied this standard to quartz models:

• Highest accuracy
• Elaborate craftsmanship
• Functional, clear design

This watch is a typical example of this transitional phase.

Warranty (used)
This is a used item. The limitation period for claims for defects (statutory warranty) is 12 months from delivery.

Note
As this is a used watch, no water resistance can be guaranteed. To protect the movement, the watch should not come into contact with water or moisture.