Seiko Cal. 5631 - 738

The Seiko 5631-738 represents an important milestone in Seiko's 1999 lineup. The Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-c2d8b7211a2f]

Also known as: Rally

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

15.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

180m

Dial Color

Silver

Jewels

28j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1999

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