Seiko Cal. 5642 - 391

The Seiko 5642-391 represents an important milestone in Seiko's 1979 lineup. With its 20mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-124d311399ca]

Also known as: Baby Tuna, Flighty

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Black

Jewels

19j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1979

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