Seiko Cal. 6139 - 778

This Spring Drive model from 1984 features a 37mm Stainless Steel case. With its 21mm lug width and 11.8mm profile, it sits comfortably on most wrists. [seikata-wm-90b1433dcfb3]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

11.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

80m

Dial Color

Navy

Jewels

17j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1984

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