Seiko Cal. 5631 - 509

This Solar model from 1979 features a 39mm Two-Tone case. With its 22mm lug width and 10.6mm profile, it sits comfortably on most wrists. [seikata-wm-e3c1576140e2]

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

39mm

Case Thickness

10.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1979

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