Seiko Cal. 4589 - 620

This Spring Drive model from 1977 features a 40mm Two-Tone case. With its 19mm lug width and 12.1mm profile, it sits comfortably on most wrists. [seikata-wm-8c9e54f1949d]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

12.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Green

Jewels

34j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1977

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