Seiko Cal. 6331 - 245

This Spring Drive model from 1981 features a 45mm Hardlex-Coated Steel case. The Bidirectional bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-cd73f3ce0f0a]

Also known as: UFO, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Champagne

Jewels

27j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1981

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