Seiko Cal. 6631 - 602

The Seiko 6631-602 represents an important milestone in Seiko's 1976 lineup. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-867ea7b43ee5]

Also known as: Goldfeather

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

9.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1976

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