Seiko Cal. 3864 - 431

The Seiko 3864-431 represents an important milestone in Seiko's 1991 lineup. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-ad5baa4bb6e0]

Also known as: Monster, Sea Horse

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

43mm

Case Thickness

8.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Green

Jewels

30j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1991

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