Seiko Cal. 5641 - 931

Released in 1989, the Cal. 5641 with design code 931 was part of Seiko's domestic market collection. With its 19mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-08fa386bb611]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

8.7mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Black

Jewels

27j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1989

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