Seiko Cal. 6644 - 671

This Quartz model from 1991 features a 40mm Hardlex-Coated Steel case. Powered by the 6644 caliber with 21j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-ca079ae3aba5]

Also known as: Rally, Sportsmatic

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

Silver

Jewels

21j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1991

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