Seiko Cal. 3891 - 320

The Seiko 3891-320 represents an important milestone in Seiko's 1987 lineup. Powered by the 3891 caliber with 24j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-b8e4081cd93a]

Also known as: Bullhead, Emperor

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

10.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

50m

Dial Color

Black

Jewels

24j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1987

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