Seiko Cal. 7139 - 728

The Seiko 7139-728 represents an important milestone in Seiko's 1977 lineup. With its 18mm lug width and 13.7mm profile, it sits comfortably on most wrists. [seikata-wm-5eb18dc39e69]

Also known as: Bullhead

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

13.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1977

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