Seiko Cal. 4558 - 931

This Spring Drive model from 1979 features a 39mm Hardlex-Coated Steel case. Powered by the 4558 caliber with 21j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-ede13dbf2297]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

15.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

21j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1979

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