Seiko Cal. 5688 - 660

The Seiko 5688-660 represents an important milestone in Seiko's 1970 lineup. With its 19mm lug width and 15.9mm profile, it sits comfortably on most wrists. [seikata-wm-1f2faebbbbce]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

15.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1970

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