Seiko Cal. 5231 - 666

This Spring Drive model from 1989 features a 34mm Two-Tone case. With its 20mm lug width and 13.7mm profile, it sits comfortably on most wrists. [seikata-wm-53956153d6f7]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

13.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Navy

Jewels

24j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1989

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