Seiko Cal. 4420 - 399

The Seiko 4420-399 represents an important milestone in Seiko's 1986 lineup. Powered by the 4420 caliber with 30j jewels beating at 28,800 bph, it delivers a 58 hours power reserve. [seikata-wm-83057e3f76b5]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

11.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Champagne

Jewels

30j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1986

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