Seiko Cal. 5631 - 737

The Seiko 5631-737 represents an important milestone in Seiko's 1981 lineup. It features a Navy dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-a8bbc3a5a7c0]

Also known as: Goldfeather

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

41mm

Case Thickness

12.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

50m

Dial Color

Navy

Jewels

36j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1981

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