Seiko Cal. 6637 - 464

The Seiko 6637-464 represents an important milestone in Seiko's 1987 lineup. The Inner Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-e0a292176543]

Also known as: Bullhead, Silverwave

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

38mm

Case Thickness

10.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Champagne

Jewels

22j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1987

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