Seiko Cal. 5687 - 380

This Spring Drive model from 1971 features a 40mm Titanium case. With its 18mm lug width and 14.5mm profile, it sits comfortably on most wrists. [seikata-wm-d85ae666bfe5]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

14.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Black

Jewels

21j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1971

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