Seiko Cal. 6331 - 771

The Seiko 6331-771 represents an important milestone in Seiko's 1982 lineup. It features a Burgundy dial protected by a Acrylic crystal and offers 130m of water resistance. [seikata-wm-8f3732b5568a]

Also known as: Monster, Sportsmatic

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

15.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

130m

Dial Color

Burgundy

Jewels

32j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1982

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