Seiko Cal. 6391 - 870

This Hand-Winding model from 1988 features a 35mm Titanium case. Powered by the 6391 caliber with 27j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-a7da04f4abde]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

35mm

Case Thickness

15.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

190m

Dial Color

Navy

Jewels

27j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1988

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