Seiko 7000

The 7000 series was a family of mid-range mechanical watch movements from Seiko from the 1970's through the 1990's.

Produced from 1973, the 7000 family was a midrange mechanical offering. It was the basis for the popular 7S26 family, and its descendants remain in production today. The family operated at the same 21,600 A/h still used by midrange Seiko mechanisms and all offered 43 hours of power reserve. All members of the family feature Seiko's bi-directional Magic Lever winding system.

There were three versions of the 7000 family before the introduction of the 7S26 with its new quickset day and date mechanism and other improvements:

1. The original 7005/7006/7025 movements appeared in the early 1970's; had quickset date but not day
2. The line expanded to include cam switching modular chronographs with the 7015/7016/7017/7018; quickset day by pushing the crown
3. The line was resurrected in the 1980's as the 7001/7002/7009/7019/7039

The 7005 and 7006 (date only and day/date respectively) designs were re-used and updated in the 1980's as the 7002 and 7009. These later movements were optimized for price and mechanized production, using many more stamped steel and plastic parts. Although they have proven fairly robust, their accuracy has suffered due to this change.

Generation	Model	Year	Jewels	Height	Complications
New date mechanism	7005A	1969-1979	17	4.5 mm	Date
	7006A	1970-1981	17/19/21	4.85 mm	Day, date
	7025A	1976-1986			Date, small rotor
Chronographs	7015A 7017A	1970-1980 1971-1981	21	5.9 mm	Day, date, chronograph 60s
	7016A	1972-1982	21	6.4 mm	Day, date, chronograph 60s, 30min, 12h
	7018A, 7018B	1971-1981	23	5.9 mm	Day, date, chronograph 60s, 30min
Push-date	7009A	1976-1998	17	5.0 mm	Day, date
	7019A 7039A	1969-1979 1974-1999	21	5.0 mm	Day, date
Divers	7001A	1988-1999	17	4.9 mm
	7002A	1988-1999	17	4.9 mm	Date

External Links

• What Drives a Workhorse: Servicing a Seiko 7005

Description: Automatic movement Kif-Duofix escapement settings Functions: Hours, minutes, central seconds Optional day and date Data: Diameter: 12 ligne (27 mm) 17, 19, 21, or 23 jewels 18,000 A/h Power reserve: 43 Hours Production period: 1961-