Seiko Cal. 6637 - 260

The Seiko 6637-260 represents an important milestone in Seiko's 1990 lineup. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-baf6ad980204]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

8.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Silver

Jewels

29j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1990

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