Seiko Cal. 6631 - 425

This Hand-Winding model from 1966 features a 38mm Two-Tone case. With its 20mm lug width and 11.9mm profile, it sits comfortably on most wrists. [seikata-wm-ca46aacee80e]

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

38mm

Case Thickness

11.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

Black

Jewels

19j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1966

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