Seiko Cal. 6139 - 739

The Seiko 6139-739 represents an important milestone in Seiko's 1984 lineup. With its 18mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-e3e45c39a176]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

8.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

170m

Dial Color

Silver

Jewels

28j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1984

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