Seiko Cal. 6231 - 644

This Spring Drive model from 1989 features a 37mm PVD Black case. Powered by the 6231 caliber with 17j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-aa651a29c67f]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

15.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

White

Jewels

17j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1989

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