Grand Seiko Quartz

When we talk about Grand Seiko quartz watches, and in particular the current 9F series, we are referring to high quality and precision calibers, assembled by hand by expert craftsmen, and produced entirely in-house (including quartz crystals).

The first Grand Seiko-branded quartz watches in history entered the scene in 1988, nearly 20 years after the world’s first quartz wristwatch: the Seiko Quartz-Astron 35SQ.

From the development of the first quartz, Seiko has continued to invest for years in research, riding and dominating the quartz revolution, to develop calibers so precious and long-lived that they fully deserve the name of Grand Seiko.

Grand Seiko’s return in 1988

In 1988 the Grand Seiko brand made its comeback after more than a decade of absence, and it does so with a very high precision quartz movement, capable of guaranteeing an accuracy of ± 10 seconds per year.

The announcement appears in the September 1988 Seiko dealer newsletter, with the introduction of four models based on the time-only 9581, and calendar 9587 calibers.

Caliber 9581

Type	Quartz
Frequency	32,768 Hz
Accuracy	±10 sec/year
Power reserve	3 years
Jewels	7 jewels
Complications	–
Battery	SR9165SW

All Grand Seiko with caliber 9581

Caliber 9587

Type	Quartz
Frequency	32,768 Hz
Accuracy	±10 sec/year
Power reserve	3 years
Jewels	7 jewels
Complications	Date
Battery	SR9165SW

All Grand Seiko with caliber 9587

Caliber 8N65

Type	Quartz
Frequency	32,768 Hz
Accuracy	±10 sec/year
Power reserve	3 years
Jewels	3 jewels
Complications	Date
Battery	SR716SW

All Grand Seiko with caliber 8N65

Caliber 3F81

Type	Quartz
Frequency	32,768 Hz
Accuracy	±10 sec/year
Power reserve	2 years
Jewels
Complications	–
Battery	SR616SW

All Grand Seiko with caliber 3F81

Caliber 9F83

Type	Quartz
Frequency	32,768 Hz
Accuracy	±10 sec/year
Power reserve	3 years
Jewels	9 jewels
Complications	Day/Date
Battery	SR920SW (SB-AN)

All Grand Seiko with caliber 9F83

Caliber 8J55

Type	Quartz
Frequency	32,768 Hz
Accuracy	±10 sec/year
Power reserve	5 years
Jewels	7 jewels
Complications	–
Battery	SR920SW (SB-AN)

All Grand Seiko with caliber 8J55

Caliber 9F82

Type	Quartz
Frequency	32,768 Hz
Accuracy	±10 sec/year
Power reserve	3 years
Jewels	9 jewels
Complications	Date
Battery	SR920SW (SB-AN)

All Grand Seiko with caliber 9F82

Caliber 8J56

Type	Quartz
Frequency	32,768 Hz
Accuracy	±10 sec/year
Power reserve	5 years
Jewels	5 jewels
Complications	Date
Battery	SR920SW (SB-AN)

All Grand Seiko with caliber 8J56

Caliber 4J51

Type	Quartz
Frequency	32,768 Hz
Accuracy	±10 sec/year
Power reserve	3 years
Jewels
Complications	–
Battery	SR521SW (SB-AC)

All Grand Seiko with caliber 4J51

Caliber 4J52

Type	Quartz
Frequency	32,768 Hz
Accuracy	±10 sec/year
Power reserve	3 years
Jewels
Complications	Date
Battery	SR621SW (SB-AG)

All Grand Seiko with caliber 4J52

Caliber 9F61

Type	Quartz
Frequency	32,768 Hz
Accuracy	±10 sec/year
Power reserve	3 years
Jewels	9 jewels
Complications	–
Battery	SR920SW (SB-AN)

All Grand Seiko with caliber 9F61

Caliber 9F62

Type	Quartz
Frequency	32,768 Hz
Accuracy	±10 sec/year
Power reserve	3 years
Jewels	9 jewels
Complications	Date
Battery	SR920SW (SB-AN)

All Grand Seiko with caliber 9F62

Caliber 9F86

Type	Quartz
Frequency	32,768 Hz
Accuracy	±10 sec/year
Power reserve	3 years
Jewels	9 jewels
Complications	Date, GMT
Battery	SR920SW (SB-AN)

All Grand Seiko with caliber 9F86

Caliber 9F85

Type	Quartz
Frequency	32,768 Hz
Accuracy	±10 sec/year
Power reserve	3 years
Jewels	9 jewels
Complications	Date
Battery	SR920SW (SB-AN)

All Grand Seiko with caliber 9F85