Seiko Cal. 3864 - 231

The Seiko 3864-231 represents an important milestone in Seiko's 1989 lineup. With its 18mm lug width and 10.1mm profile, it sits comfortably on most wrists. [seikata-wm-962c4329e7ad]

Also known as: Bullhead, Sea Horse

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Green

Jewels

29j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1989

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