Seiko Cal. 6631 - 204

The Seiko 6631-204 represents an important milestone in Seiko's 1997 lineup. The Rotating bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-037ed794aaa8]

Also known as: Tuna, World Timer

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

10.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

White

Jewels

26j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1997

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