Seiko Cal. 6634 - 587

The Seiko 6634-587 represents an important milestone in Seiko's 1994 lineup. It features a Navy dial protected by a Acrylic crystal and offers 150m of water resistance. [seikata-wm-d8e0cbb03cf2]

Also known as: Monster, Sumo

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

44mm

Case Thickness

13.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

150m

Dial Color

Navy

Jewels

22j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1994

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