Seiko Cal. 3891 - 412

The Seiko 3891-412 represents an important milestone in Seiko's 1984 lineup. With its 20mm lug width and 13.2mm profile, it sits comfortably on most wrists. [seikata-wm-eac8fa7faab1]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

46mm

Case Thickness

13.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Green

Jewels

33j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1984

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