Seiko Cal. 5645 - 631

The Seiko 5645-631 represents an important milestone in Seiko's 1989 lineup. With its 20mm lug width and 12.0mm profile, it sits comfortably on most wrists. [seikata-wm-27a7ba224d2d]

Also known as: Silverwave, Sea Horse

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

12.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Cream

Jewels

29j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1989

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