Seiko Cal. 6631 - 588

The Seiko 6631-588 represents an important milestone in Seiko's 1985 lineup. The Bidirectional bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-ed16760be10d]

Specifications

Movement

Solar

Case Material

Titanium

Case Width

35mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

40m

Dial Color

White

Jewels

21j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1985

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