Seiko Cal. 6331 - 754

This Spring Drive model from 1987 features a 35mm PVD Black case. The Rotating bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-0923a49713bb]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

12.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

Silver

Jewels

32j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1987

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