Seiko Cal. 3831 - 997

The Seiko 3831-997 represents an important milestone in Seiko's 1980 lineup. It features a Burgundy dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-53ba1da44ddd]

Also known as: Sumo, Bellmatic

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

44mm

Case Thickness

14.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Burgundy

Jewels

25j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1980

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