Seiko Cal. 3831 - 604

This Hand-Winding model from 1966 features a 40mm Two-Tone case. With its 18mm lug width and 10.5mm profile, it sits comfortably on most wrists. [seikata-wm-2d841b658fd1]

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

10.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

180m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1966

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