Seiko Cal. 4578 - 996

The 4578-996 is a sought-after Quartz piece from Seiko's golden era. Powered by the 4578 caliber with 20j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-f3d250ea76ce]

Also known as: Sumo, Helmet

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Navy

Jewels

20j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1991

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