Seiko Cal. 5631 - 337

This Hand-Winding model from 1987 features a 43mm Gold-Plated case. With its 21mm lug width and 14.0mm profile, it sits comfortably on most wrists. [seikata-wm-fd8404ea12f6]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

14.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Cream

Jewels

31j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1987

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