Seiko Cal. 5631 - 903

The Seiko 5631-903 represents an important milestone in Seiko's 1999 lineup. With its 19mm lug width and 13.7mm profile, it sits comfortably on most wrists. [seikata-wm-b9ca88dff6ec]

Also known as: Silverwave

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

13.7mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

160m

Dial Color

Champagne

Jewels

35j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1999

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