Seiko Cal. 3881 - 863

The Seiko 3881-863 represents an important milestone in Seiko's 1971 lineup. With its 21mm lug width and 13.7mm profile, it sits comfortably on most wrists. [seikata-wm-49d1a8c2d1ca]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

13.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1971

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