Seiko Cal. 4420 - 359

This Solar model from 1971 features a 43mm PVD Black case. Powered by the 4420 caliber with 18j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-7d6ae0eddd2e]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

43mm

Case Thickness

15.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

80m

Dial Color

Navy

Jewels

18j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1971

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