Seiko Cal. 6637 - 587

The Seiko 6637-587 represents an important milestone in Seiko's 1991 lineup. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-e80c1aac9ff4]

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

8.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Champagne

Jewels

18j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1991

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