Seiko Cal. 4578 - 933

This Spring Drive model from 1987 features a 42mm Hardlex-Coated Steel case. Powered by the 4578 caliber with 18j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-3a0b91ab83a5]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

15.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

70m

Dial Color

Cream

Jewels

18j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1987

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