Seiko Cal. 5613 - 231

The Seiko 5613-231 represents an important milestone in Seiko's 1996 lineup. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-bcf24cec6c27]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

12.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

90m

Dial Color

White

Jewels

18j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1996

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