Seiko Cal. 5660 - 686

The Seiko 5660-686 represents an important milestone in Seiko's 1977 lineup. With its 19mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-df11ac39efe6]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

15.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Black

Jewels

29j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1977

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