Seiko Cal. 4578 - 437

This Hand-Winding model from 1981 features a 34mm PVD Black case. Powered by the 4578 caliber with 21j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-b38234ef66ef]

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

34mm

Case Thickness

15.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Silver

Jewels

21j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1981

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