Seiko Cal. 5631 - 190

The Seiko 5631-190 represents an important milestone in Seiko's 1999 lineup. With its 18mm lug width and 15.1mm profile, it sits comfortably on most wrists. [seikata-wm-aeefd8af2e11]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

15.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Silver

Jewels

23j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1999

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