Seiko Cal. 5660 - 674

The Seiko 5660-674 represents an important milestone in Seiko's 1984 lineup. With its 22mm lug width and 11.6mm profile, it sits comfortably on most wrists. [seikata-wm-b5350b4ef1f3]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

11.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Green

Jewels

19j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1984

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