Seiko Cal. 6389 - 131

This Spring Drive model from 1977 features a 38mm Hardlex-Coated Steel case. The Coin-Edge bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-6f56e8d23ac1]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

13.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Champagne

Jewels

36j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1977

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