Seiko Cal. 7186 - 181

This Spring Drive model from 1975 features a 37mm Titanium case. With its 21mm lug width and 9.6mm profile, it sits comfortably on most wrists. [seikata-wm-e0792bc0cada]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

9.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

22j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1975

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