Seiko Cal. 7181 - 634

The Seiko 7181-634 represents an important milestone in Seiko's 1971 lineup. With its 22mm lug width and 15.6mm profile, it sits comfortably on most wrists. [seikata-wm-aaf7054a8157]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

180m

Dial Color

Champagne

Jewels

22j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1971

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