Seiko Cal. 6331 - 987

This Quartz model from 1971 features a 41mm Gold-Plated case. It features a Green dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-79ef96c388e2]

Also known as: Sportsmatic

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Green

Jewels

27j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1971

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