Seiko Cal. 7139 - 978

The Seiko 7139-978 represents an important milestone in Seiko's 1968 lineup. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-f1aacd6fadbb]

Also known as: Navigator

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

39mm

Case Thickness

9.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

White

Jewels

21j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1968

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