Seiko Cal. 3891 - 631

The Seiko 3891-631 represents an important milestone in Seiko's 1987 lineup. It features a Cream dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-cecaffa996ed]

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

43mm

Case Thickness

10.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Cream

Jewels

35j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1987

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