Seiko Cal. 5677 - 643

The Seiko 5677-643 represents an important milestone in Seiko's 1979 lineup. With its 21mm lug width and 9.1mm profile, it sits comfortably on most wrists. [seikata-wm-5a2ce33f854b]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

30m

Dial Color

Cream

Jewels

34j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1979

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