Seiko Cal. 5663 - 398

This Spring Drive model from 1978 features a 38mm PVD Black case. With its 19mm lug width and 8.9mm profile, it sits comfortably on most wrists. [seikata-wm-06af77cbfdf0]

Also known as: Helmet, Flighty

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

8.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

80m

Dial Color

Burgundy

Jewels

28j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1978

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