Seiko Cal. 6138 - 631

The Seiko 6138-631 represents an important milestone in Seiko's 1991 lineup. The Bidirectional bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-549891bf54a2]

Also known as: Baby Tuna

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

12.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1991

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