Seiko Cal. 3891 - 378

The Seiko 3891-378 represents an important milestone in Seiko's 1988 lineup. Powered by the 3891 caliber with 24j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-8c0140df0b6f]

Also known as: Navigator, Sea Horse

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Black

Jewels

24j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1988

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