Seiko Cal. 6631 - 770

This Hand-Winding model from 1990 features a 35mm Two-Tone case. With its 20mm lug width and 12.9mm profile, it sits comfortably on most wrists. [seikata-wm-78c69973feac]

Also known as: Samurai, Crown

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

35mm

Case Thickness

12.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

160m

Dial Color

White

Jewels

21j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1990

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