Seiko Cal. 5231 - 674

This Spring Drive model from 1989 features a 37mm Two-Tone case. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 90m of water resistance. [seikata-wm-cebbdf0b5f1f]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

9.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1989

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