Seiko Cal. 6397 - 742

The Seiko 6397-742 represents an important milestone in Seiko's 1981 lineup. With its 18mm lug width and 12.2mm profile, it sits comfortably on most wrists. [seikata-wm-8b1e1410ce3c]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Champagne

Jewels

32j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1981

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