Seiko Cal. 4578 - 378

This Spring Drive model from 1980 features a 39mm PVD Black case. With its 18mm lug width and 8.1mm profile, it sits comfortably on most wrists. [seikata-wm-899e75af61d0]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

8.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Champagne

Jewels

21j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1980

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