Seiko Cal. 6637 - 892

The Seiko 6637-892 represents an important milestone in Seiko's 1988 lineup. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-0674364eb0f7]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

14.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1988

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