Seiko Cal. 5231 - 657

The Seiko 5231-657 represents an important milestone in Seiko's 1967 lineup. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-4b1732bfe6db]

Also known as: Pogue, UFO

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

37mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Cream

Jewels

23j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1967

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