Seiko Cal. 5660 - 231

The Seiko 5660-231 represents an important milestone in Seiko's 1974 lineup. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-bb484eece752]

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

15.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Champagne

Jewels

35j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1974

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