Seiko Cal. 4420 - 400

The Seiko 4420-400 represents an important milestone in Seiko's 1966 lineup. Powered by the 4420 caliber with 18j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-a340fe121ae0]

Also known as: World Timer

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

38mm

Case Thickness

9.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Silver

Jewels

18j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1966

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