Seiko Cal. 4420 - 988

The Seiko 4420-988 represents an important milestone in Seiko's 1984 lineup. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-be0ef387b882]

Also known as: Baby Tuna, Flighty

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

13.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Silver

Jewels

35j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1984

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