Seiko Cal. 5631 - 245

This Quartz model from 1990 features a 40mm Hardlex-Coated Steel case. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-348be743de9c]

Also known as: Crown, Baby Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

12.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1990

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