Seiko Cal. 6637 - 187

The Seiko 6637-187 represents an important milestone in Seiko's 1989 lineup. The Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-cb92d2c33f43]

Also known as: Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

8.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

200m

Dial Color

Cream

Jewels

33j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1989

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