Seiko Cal. 6657 - 422

The Seiko 6657-422 represents an important milestone in Seiko's 1968 lineup. The Inner Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-fb7ebd8afc5a]

Also known as: Turtle, UFO

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

41mm

Case Thickness

12.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Champagne

Jewels

24j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1968

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