Seiko Cal. 6638 - 230

The Seiko 6638-230 represents an important milestone in Seiko's 1969 lineup. With its 18mm lug width and 10.6mm profile, it sits comfortably on most wrists. [seikata-wm-870ba7ac3669]

Also known as: Rally, Silverwave

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

140m

Dial Color

Champagne

Jewels

34j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1969

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