Seiko Cal. 6658 - 660

The Seiko 6658-660 represents an important milestone in Seiko's 1981 lineup. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-27c4f1e51400]

Also known as: Golden Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

15.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1981

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