Seiko Cal. 5661 - 739

The Seiko 5661-739 represents an important milestone in Seiko's 1979 lineup. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 30m of water resistance. [seikata-wm-1a21909b3337]

Also known as: Silverwave, Golden Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

14.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1979

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