Seiko Cal. 6634 - 139

The Seiko 6634-139 represents an important milestone in Seiko's 1983 lineup. The Fixed bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-17c36ade88ef]

Also known as: Sumo, Rally

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

11.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Burgundy

Jewels

17j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1983

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