Seiko Cal. 6631 - 774

The Seiko 6631-774 represents an important milestone in Seiko's 1981 lineup. It features a Burgundy dial protected by a Hardlex crystal and offers 200m of water resistance. [seikata-wm-5c482bdb0856]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

44mm

Case Thickness

12.7mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

Burgundy

Jewels

33j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1981

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