Seiko Cal. 6631 - 187

The Seiko 6631-187 represents an important milestone in Seiko's 1994 lineup. The Coin-Edge bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-0b4db92ee09e]

Also known as: Shogun, Pogue

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

36mm

Case Thickness

14.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1994

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