Seiko Cal. 7139 - 443

The Seiko 7139-443 represents an important milestone in Seiko's 1970 lineup. It features a White dial protected by a Hardlex crystal and offers 200m of water resistance. [seikata-wm-9ec3986cc6ff]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

10.9mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

200m

Dial Color

White

Jewels

20j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1970

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