Seiko Cal. 5691 - 857

This Spring Drive model from 1985 features a 37mm Hardlex-Coated Steel case. With its 22mm lug width and 14.0mm profile, it sits comfortably on most wrists. [seikata-wm-f8bea7a71b24]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

14.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1985

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