Seiko Cal. 6637 - 257

The Seiko 6637-257 represents an important milestone in Seiko's 1979 lineup. The Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-9dcf9362abf9]

Also known as: Shogun

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

13.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

180m

Dial Color

Silver

Jewels

32j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1979

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