Seiko Cal. 6637 - 688

The Seiko 6637-688 represents an important milestone in Seiko's 1998 lineup. The Fixed bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-fc19b49a5fb3]

Also known as: Samurai

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

70m

Dial Color

Green

Jewels

24j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1998

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