Seiko Cal. 5687 - 403

The Seiko 5687-403 represents an important milestone in Seiko's 1987 lineup. With its 19mm lug width and 9.9mm profile, it sits comfortably on most wrists. [seikata-wm-3f3d0b3e12a7]

Also known as: Sumo, Silverwave

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Champagne

Jewels

27j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1987

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