Seiko Cal. 6139 - 657

The Seiko 6139-657 represents an important milestone in Seiko's 1981 lineup. With its 18mm lug width and 14.8mm profile, it sits comfortably on most wrists. [seikata-wm-d0e34758eaa5]

Also known as: Sportsmatic, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

14.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Cream

Jewels

29j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1981

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