Seiko Cal. 6638 - 830

The Seiko 6638-830 represents an important milestone in Seiko's 1965 lineup. With its 21mm lug width and 14.6mm profile, it sits comfortably on most wrists. [seikata-wm-becd34125ff0]

Also known as: Monster

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

14.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

22j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1965

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