Seiko Cal. 6634 - 428

The Seiko 6634-428 represents an important milestone in Seiko's 1982 lineup. The Fixed bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-ec3b9adb1ef5]

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

39mm

Case Thickness

10.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

40m

Dial Color

Cream

Jewels

31j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1982

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