Seiko Cal. 6331 - 108

The Seiko 6331-108 represents an important milestone in Seiko's 1987 lineup. Powered by the 6331 caliber with 31j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-29679e29abb2]

Also known as: Monster, Pogue

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

10.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Black

Jewels

31j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1987

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