Seiko Cal. 3876 - 381

The Seiko 3876-381 represents an important milestone in Seiko's 1969 lineup. With its 20mm lug width and 13.3mm profile, it sits comfortably on most wrists. [seikata-wm-a95c16abd357]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

13.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1969

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