Seiko Cal. 3831 - 649

This Automatic model from 1971 features a 37mm Stainless Steel case. With its 18mm lug width and 11.1mm profile, it sits comfortably on most wrists. [seikata-wm-cfd7104401be]

Also known as: Crown

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1971

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