Seiko Cal. 6331 - 739

The Seiko 6331-739 represents an important milestone in Seiko's 1991 lineup. With its 19mm lug width and 11.6mm profile, it sits comfortably on most wrists. [seikata-wm-2345ba94bb35]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

11.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Cream

Jewels

23j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1991

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