Seiko Cal. 5621 - 731

The Seiko 5621-731 represents an important milestone in Seiko's 1988 lineup. It features a Black dial protected by a Hardlex crystal and offers 130m of water resistance. [seikata-wm-8958d23fd898]

Also known as: Bellmatic

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

14.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

130m

Dial Color

Black

Jewels

28j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1988

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