Seiko Cal. 4478 - 744

The 4478-744 is a sought-after Quartz piece from Seiko's golden era. Powered by the 4478 caliber with 20j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-afbe017af3c4]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

15.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Cream

Jewels

20j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1972

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