Seiko Cal. 5687 - 647

This Spring Drive model from 1984 features a 43mm Hardlex-Coated Steel case. With its 21mm lug width and 10.4mm profile, it sits comfortably on most wrists. [seikata-wm-3a8eee6f051d]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

10.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

170m

Dial Color

Cream

Jewels

32j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1984

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