Seiko Cal. 4578 - 918

This Hand-Winding model from 1983 features a 43mm Titanium case. Powered by the 4578 caliber with 31j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-4f0524e3fa2e]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

43mm

Case Thickness

12.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1983

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