Seiko Cal. 6397 - 431

The Seiko 6397-431 represents an important milestone in Seiko's 1988 lineup. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-219a00dca3de]

Also known as: Bullhead, Flighty

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

11.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1988

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