Seiko Cal. 5665 - 674

This Spring Drive model from 1981 features a 43mm Titanium case. With its 18mm lug width and 11.4mm profile, it sits comfortably on most wrists. [seikata-wm-3a606ce3ea64]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Black

Jewels

28j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1981

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