Seiko Cal. 5639 - 188

The Seiko 5639-188 represents an important milestone in Seiko's 1999 lineup. The Fixed bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-5cb7e331b38b]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

45mm

Case Thickness

15.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

150m

Dial Color

Black

Jewels

32j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1999

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