Seiko Cal. 3886 - 931

The Seiko 3886-931 represents an important milestone in Seiko's 1972 lineup. With its 21mm lug width and 12.6mm profile, it sits comfortably on most wrists. [seikata-wm-5a6e0d2a5086]

Also known as: Monster, Rally

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

12.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Cream

Jewels

21j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1972

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