Seiko Cal. 5631 - 918

This Solar model from 1996 features a 36mm PVD Black case. Powered by the 5631 caliber with 27j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-418cf028b3ce]

Also known as: Monster, Tuna

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

36mm

Case Thickness

9.1mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

Cream

Jewels

27j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1996

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