Seiko Cal. 4420 - 903

The Seiko 4420-903 represents an important milestone in Seiko's 1972 lineup. Powered by the 4420 caliber with 30j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-2157c9111bac]

Also known as: Rally, Navigator

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

8.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Green

Jewels

30j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1972

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