Seiko Cal. 0731 - 632

The Seiko 0731-632 represents an important milestone in Seiko's 1987 lineup. It features a Black dial protected by a Acrylic crystal and offers 40m of water resistance. [seikata-wm-65b5e17a9d5d]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

34mm

Case Thickness

15.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Black

Jewels

25j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1987

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