Seiko Cal. 6231 - 903

The Seiko 6231-903 represents an important milestone in Seiko's 1969 lineup. The Fixed bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-3d2a24f0e5d5]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

38mm

Case Thickness

8.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

80m

Dial Color

Cream

Jewels

18j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1969

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