Seiko Cal. 5631 - 347

This Automatic model from 1977 features a 35mm Two-Tone case. With its 18mm lug width and 8.5mm profile, it sits comfortably on most wrists. [seikata-wm-38457a06408a]

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

8.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

200m

Dial Color

White

Jewels

32j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1977

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