Seiko Cal. 5630 - 670

This Spring Drive model from 1990 features a 37mm Two-Tone case. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-5342df948e44]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

15.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1990

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