Seiko Cal. 6391 - 389

The Seiko 6391-389 represents an important milestone in Seiko's 1991 lineup. With its 19mm lug width and 15.0mm profile, it sits comfortably on most wrists. [seikata-wm-1ec8fb994cab]

Also known as: Bullhead, Rally

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

15.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1991

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